Gopal Das (Pran) is a vile greedy man who is in love with a girl Shyama (Shashikala). Once, he visits a wedding which is called off as the bride Roopa (Poornima) is dark. During that plight, Gopal Das marries Roopa, for her property. Later, he returns and assures Shyama that he will shortly discard Roopa and marry her. Time passes, and the couple is blessed with a baby girl Rani. Due to extortion by Shyama, Gopal Das seeks to kill Roopa along with the baby. Fortuitously, the child is rescued which Gopal Das hides. Years roll by, and Gopal Das marries Shyama and secretly rears Rani (Leena Chadravakar). In college, she loves a smart guy Rajesh (Jeetendra) the brother of her close friend Shobha (Aruna Irani). After completion of their education, they all go back to their home towns. Gopal Das accommodates Rani separately and comforts her with a job as his personal secretary but on the condition that no one should know she is his daughter. Meanwhile, Rajesh & Shobha leave their father's house since they oppose his remarriage (D.K. Sapru). They move to the same city as Rani, where Rajesh befriends Shivram (Mehmood) who rents a portion of his house. Rajesh also acquires a job at Gopal Das’s office with the help of Rani. Meanwhile, Shivram falls for Shobha and they get married. Rajesh’s presence begrudges Man Mohan (Man Mohan) the distant relative of Shyama, one that keeps a bad eye on Rani. Man Mohan shadows Gopal Das and learns the reality. Hence, he threatens Gopal Das to get him married to Rani by holding a letter that he wrote long ago regarding the evil plan to slay Roopa. So, Gopal Das pleads with Rajesh to break up with Rani and he does so by pretending to be an imposter. Later, Gopal Das realizes Rajesh’s honesty, divulges the actuality to Rani, unites them, and surrenders himself to the Police. Later we find out, fortunately, Roopa is alive. Being aware of it, Man Mohan schemes to eliminate her but Shyama dies while guarding Roopa. At last, Rajesh rescues Roopa and acquits Gopal Das. The movie ends on a happy note with the marriage of Rajesh & Rani.