Atatayee is a film set during the Naxal times when youth resorted to violence to declass the society and bring about change. Dibyendu leads a bunch of young men to the villages to instigate the farmers to start a revolution. Sunil is one of them. A brilliant student Sunil drops out of college and joins the movement. He asks the love of his life Mira to marry Dibakar as his life and future are uncertain. Dibyendu gets killed by the police. Sunil and his friends Gopal and Sanjay go back to the city. Sunil gets arrested and is jailed for five years when he goes to meet his father after hearing from Dibakar about his heart attack. He realizes that he was duped by his friends. After five years he comes back and finds Sanjay and Gopal well-established. When Sunil charges them for getting him arrested they blame Dibakar for it. Sunil fails to trace Dibakar and Mira. Sunil takes revenge by killing Gopal and Sanjay. He finally traces Mira only to find Dibakar paralyzed and bed-ridden. Mira tells Sunil that Gopal and Sanjay had trapped and fooled them. Police tortures had paralyzed Dibakar for life. Sunil who had come to kill Dibakar leaves back his gun with Barun, Dibakar’s son so that he learns to use it wisely one day.