Ek Tha Chandar Ek Thi Sudha (English: One was Chander one was Sudha) is an Indian television series, which premiered on 21 September 2015 and is broadcast on Life OK. The series is produced by Ashwni Dhir's Garima Productions and aired every Monday to Friday night. The series is a tragic love story and is a 20-episode series based on Dharamvir Bharati’s iconic 1949 novel, Gunahon Ka Devta. Rahil Azam and Umang Jain appeared in lead roles.

Plot A man tells an awaiting lady to keep this flower in his feet, everything will be fine. The lady takes the flower and lays them at the feet of a girl in bed. She whispers the name Chandar. The doctor tells her father that the poison has spread in her body, Sudha is in a weak condition, but if she can stay alive for 2 more hours then she'll live. Sudha gains consciousness but doesn't remember anyone. She loves the rain and it starts to rain outside, so the doctor tells them to take her on the porch. Chandar comes in a car. Sudha looks at the car, then sits still.

Flashback A teacher takes roll call. Sudha runs to the class late, then creeps to her seat from beneath the chairs. The teacher calls Sudha's name, Sudha raises her hand along with the shoe that she held in her hand not to make a noise. The teacher asks why she is showing her a show, Sudha says it broke. Everyone laughs, the teacher tells her to sit down. Sudha sits with a group of three girls. The teacher begins the lecture, Sudha is caught again talking by the teacher. The teacher says that this is the girls of today. Sudha was eating spinach that her friend had brought and had it in hand, she tells upon teacher's query that it was brought by Geesu, her friend. The teacher asks Geesu to stand up. She questions if they both eat spinach in the class, if they are girls or goats. She calls them both in the front, and sends them out of the class and shut the doors, they abide by her. Sudha opens the door again and says this way they won't be able to attend the class, the teacher reassures that this is what she has punished her with. Both the friends run excitedly.

In the corridor, Sudha tells Geesu she is going to station as Chandar is coming. In the train, a young man sat with her notebook open. He read a letter and smiles thinking how Sudha came to him and asked him to put thread in needle. Chandar wasn't ready, but Sudha had snatched his book from him. He put the thread in the needle while Sudha helps him in it. He takes his book back and regrets he has lost the page. Sudha questions why he doesn't keep a book mark in it? Chandar asks where to bring a bookmark now, Sudha had written a note behind her photo, "Don’t look here and there and concentrate on your book." She had said that she will also be there to take care of him.

Sudha travelled in the car towards the station. She comes down the car while Chandar comes out of the train. The train arrive at the station. Sudha lay her head on the track to hear the sound of the train arriving, then watches it coming. The passengers prepare the leave. Chandar comes out of the train, no one was there to welcome him. He comes down. Sudha runs to him from behind, stops him and smiles. He doesn't stop and leaves instead towards a group of drummers who were there to welcome him. He says to Thakkur what this is, Thakkur says Chandar has returned with a trophy for him, a celebration was a must. Sudha was left behind waiting.

At home, floral decorations had been made. A lady scolded the men for playing Holi here. Sudha's papa arrive, he gives the lady sweet box saying his Chandar is coming after winning a trophy. The lady comes behind Papa and asks what kind of Topi (Cap) this is for which Sudha also brought sweet. Papa explains it is a gift. There is horn outside, a car arrives and Sudha comes in alone, red in rage. Papa asks where is Chandar. Sudha says she doesn't know, she was crying and says he must scold him when he arrives, she had been waiting for him on station and he didn't look at her, instead he left the station.

The boys brought Chandar to university hooting and shouting about the victory of Chandar. Chandar was welcomed, his friend Thakkur boasted in front of everyone that he won trophy in Delhi. Thakkur asks them all to give way to Chandar, they have to celebrate as well.

Sudha tells Mai (the lady at house) to put in more milk in Chandar's milk. At least he must remember he had promised someone else. Geesu comes home with rose bunch and says this is for her to bring smile on her face. She asks Sudha if she had a fight with someone.

Chandar comes to stage, he makes a speech which makes everyone laugh. They all clap in appreciation. Thankkur tells Chandar he must meet Billu. Chandar asks now? And looks at time.

Sudha was crying and asks Geesu why Chandar does so, he knew there is Pooja at home. Why he didn't come to Pooja and went with his friends. Geesu says she is sure he will soon come home. Kamini and Prabha also come home, they come and notices Sudha has high fever. Sudha was still upset.

Chandar meets his teacher, his teacher says there is a fire in Chandar and he must not let it out. His college needs such a light. Chandar says he was a lost person, his teachers have made him what he is. The teacher says a teacher is only a teacher when he gets an eligible student. He says he sees a shadow on himself in Chandar and wants him to succeed. He must take care of one think, he must never leave his brought up, and must never forget those who owed him. He will be successful. Anyone can be a man, it takes a cost to become a Dev.

Pandit ji asks to begin the pooja, Papa asks about Sudha who asks to wait for just a little while. Their family is incomplete without Chandar. Papa leaves, Mai asks him where is Sudha. Papa says Sudha says without Chandar, this family is incomplete. For him, without Chandar and Sudha both the family is incomplete. Sudha awaits Chandar.

Chandar comes back home. Ramu kaka welcomes him. Chandar comes to meet Papa and apologizes him. Papa says he knows only one person can forgive them in this house. He asks about Sudha. Mai comes to tell them Sudha has locked herself in the room. Chandar tells Papa not to worry and goes inside the corridor. He remembers making up Sudha like this always since childhood. He remember how Sudha had hurt her head once before. He knocks at the door, and politely asks Sudha to open the door and if she doesn't open the door he will break the door. She knows well the door is strong and he will be hurt. He struggles for once, but Sudha opens the door on his second try. He comes inside to look at Sudha and asks isn't she ready till yet. He says she looks good even this way. He says he has told everyone he will bring her, won't she keep his promise. Sudha says he always does this to her, he always want to win over her but today she won't listen to him.

Chandar asks won't she listen to him? She turns around and says she didn't listen to her father, who is he then. Chandar comes out of the house alone. Papa asks where is Sudha, Sudha appears from behind Chandar. Everyone is happy to see her all dressed up.

Everyone is happy to see Sudha, the pooja begins. Chandar and Sudha enjoy the pooja rituals. Sudha brings Prasad to Papa who was with a friend, the friend detects that Sudha has fever. Papa and his friend asks Sudha to go and take rest, Sudha resists. Papa calls Chandar and he insists on Sudha to go inside. Sudha comes inside angry, her friends also come in asking what happened. Sudha says she has a light fever, today is festivity and there will be music and dance but Chandar sent her inside. They hear the drums outside, the girls come to terrace. Sudha watches Chandar dancing and says she knows a calming therapy that lets fever vanish. She teaches her friends about the verses, and says they must keep repeating these verses without opening their eyes. They ask what nonsense this is. Sudha says Chandar taught this to her. They think it must be right one then. They do so, Sudha goes into the kitchen and keeps her head in the freezer. She says her forehead is now normal. She comes out, Papa says her forehead is cold, in fact it is cold more than normal. She goes to dance. Chandar asks Sudha's friends how she got rid of her fever so soon, they tell him about the therapy. He is shocked to see this, but they say he had taught this himself. Chandar looks at Sudha who was feeling dizzy and faints. Papa calls for a doctor.

Doctor observes Sudha and tells Papa it is just a fever, nothing else. He writes medicine for Sudha and asks Chandar to keep cold cloth on Sudha's forehead. He takes Papa out with him. Chandar sits with Sudha. Outside, the doctor says to Mr. Shukla that he worries so soon. Papa says he will know only if he will have a daughter. The doctor asks if he must marry in this age. Papa jokes who will marry him. He tells Mr. Shukla that he is in hurry right now, as his patients have been waiting. They promise to meet in club.

Sudha wakes up and asks Chandar if he is angry. Chandar says it is about getting angry. Sudha sits up and says she is also angry with him. He must have come home straight. He says his friends took him from station and asks Sudha how she got rid of her fever. Sudha says didn't be bring trophy. Chandar says she will show it to her father first. Sudha asks him to go and ask Papa how the fever was gone. She asks for trophy. He points at it. She picks the trophy and cheers. He says he is still angry at her, she doesn't listen to him and leaves. Sudha stands behind, she says wouldn't he ask how she got this fever. Chandar returns and asks how. She says she kept on standing at station, but he left with his friends. She cries. Chandar apologizes her. Sudha turns to him, he says she doesn't look good crying. She wipes her tears, he asks her how she got rid of her fever. Sudha says she can show it to him, and tells him to shut his eyes. She takes him to kitchen, his eyes still shut. They come to freezer, she tells him to bend into the freezer, opens his eyes and is shocked to see. Sudha laughs. Chandar asks if she has gone crazy. Sudha says he had also kept cold cloth on her forehead soaked in ice, she instead placed her head on ice. Chandar leaves.

Chandar gives a pen to Mr. Shukla that could be refilled without getting hands stained with ink. Mr. Shukla is happy and asks Chandar to show him the trophy. He hugs Chandar congratulating him about it, he says he really boasts up when he gets successful. He says Sudha had also been waiting for him, and asks how Sudha is. Chandar says she is fine. Mr. Shukla says he doesn't get when Sudha will leave this childish attitude, then tells Chandar to take trophy home and decorate it. He decorates it on a rack there and says this is home. Mr. Shukla tells him not to leave without having dinner.

Chandar comes home, and watches Sudha's photo with her autograph.

In the morning, Chandar stood at the lake side. Papa comes out there praying. He watches Chandar standing there and comes to him. Chandar takes his blessings. Pandit ji tells Mr. Shukla that Chandar comes even before sun rise. Papa asks him to give an opportunity to him at least once that he arrives before Chandar. Chandar says that Mr. Shukla has given him opportunities every time in life, he never let Chandar realize that he isn't actually a part of his family. Mr. Shukla and Chandar sit for a while where Mr. Shukla discuss with Chandar and says that he has taken all his responsibilities but sometimes he is worried about Sudha as she is growing up. He says that Sudha has grown up but her childish behavior doesn't go away. He could never scold Sudha as she has no mother. Chandar tells him that good people always get good. Mr. Shukla says he has never done anything wrong in life deliberately. Chandar says if they sit for some more time here they will both get scolded by Sudha. Mr. Shukla watches the time, it was 7.30.