The Police Commissioner, Advocate Sinha and Police Inspector Vikram Singh arrive at the Central Mental Hospital to speak with an inmate, Arun Saxena. They hope to get Vikram to befriend Arun so that they may get to the bottom of the thriller as to why Arun ended up romancing wealthy Sapna, then getting involved with Jyoti, and sooner or later killing her. Arun is arrested, confesses to the the homicide and is sentenced to be hanged. This news unsettles Arun to such an make bigger that he will become mentally unstable and is institutionalized. Vikram hopes to befriend Arun, get him cured and medically discharged, and make certain that he is hanged.