The Secret Passage

Chandramukhi observes Prince opening that room number 16. She asks her hawaldars to get a duplicate key made and manages to enter the room, discover a secret passageway, and find the man and Bijli tied up and held hostage. Later, Prince dresses Bijli as his aunt so that he can claim his aunt's property. But Chandramukhi outsmarts him and comes along with real aunt. Prince is arrested and the case is solved.