what was chunni babu' s plan ? explain in brief............

Chunni Babu was Bepin's childhood friend. But, Bepin had not helped him in time of need when he was short of money. In order to take revenge, Chunni made an elaborate plan. With the help of some actors and common friends, he convinced Bepin that he had completely forgotten about a trip to Ranchi that he had undertaken some years ago. Bepin started believing he was losing his mind as the evidence provided was convincing. He even visited Ranchi to jog his memory. Finally, he thought he was going insane like his brother. That was when Chunni revealed his plan and Bepin was left feeling extremely foolish and guilty.