The film tells the story of four children who are separated at a fair and unknowingly reunite years later when Geeta (Sadhana) meets Nita (also Sadhana) in prison. Nita has been wrongly accused of murder. Geeta is then caught up in a scheme to find the true killer which leads her to her brother Johnny's (Sunil Dutt) gang.

Sunil Dutt
as Suraj / Johnny

Sadhana Shivdasani
as Kavita / Neeta / Geeta

Feroz Khan
as Raja

Helen
as Savitri

Agha
as

Ramesh Deo
as Inspector Chandu

Birbal
as Vendor who sells toy monkey to Suraj

Keshto Mukherjee
as Keshto - Raja's Assistant

Murad
as D.I.G. of Police

Rajendranath Malhotra
as Man who wins lottery