Ek Hi Bhool

Ram (Jeetendra) and Sadhana (Rekha) are a married couple. They live a wealthy lifestyle together. Ram is a graduate, and works as an administrator in a multinational company and earns well. Their marriage comes to an end when Ram betrays Sadhana with her best friend Urvashi. Ram confesses the truth as he gets drunk, and tries to explain himself, and even Sadhnas family tries to convince her to condone this one little mistake, but Sadhana cannot forgive him his unfaithfulness and she divorces Ram.

After their divorce, Sadhana finds out that she is pregnant. She moves into her new home. Ten years later, they meet each other in a bus and Ram is the new manager of the office where Sadhna works. Coincidentally, Rams new house is close to Sadhanas in the same neighborhood. Now when theyre neighbours, Ram tries to captivate her again and return his family and wife.

He gets close to his son Raju. Will Sadhana forgive him his one and only mistake?.