The Police Commissioner, Advocate Sinha and Police Inspector Vikram Singh arrive at the Central Mental Hospital to speak with an inmate, Arun Saxena. They wish to get Vikram to befriend Arun so that they could get to the bottom of the thriller as to why Arun ended up romancing wealthy Sapna, then getting concerned with Jyoti, and eventually killing her. Arun is arrested, confesses to the the murder and is sentenced to be hanged. This information unsettles Arun to such an expand that he will become mentally unstable and is institutionalized. Vikram hopes to befriend Arun, get him cured and medically discharged, and ensure that he's hanged.