The Police Commissioner, Advocate Sinha and Police Inspector Vikram Singh arrive on the Central Mental Hospital to talk with an inmate, Arun Saxena. They wish to get Vikram to befriend Arun so that they might get to the bottom of the thriller as to why Arun ended up romancing rich Sapna, then getting worried with Jyoti, and in the end killing her. Arun is arrested, confesses to the the homicide and is sentenced to be hanged. This news unsettles Arun to such an enlarge that he will become mentally unstable and is institutionalized. Vikram hopes to befriend Arun, get him cured and medically discharged, and make sure that he's hanged.