A male and a female in their human forms are in love with each other. When the male turns back into a snake, he is shot by a member of a hunting party, who thought the snake was going to attack the woman. Enraged at the brutal killing of her beloved; the female snake begins to take revenge on the six involved, killing them one by one after assuming the form of a human.

Rekha
as Sunita

Jeetendra
as Nag (male serpent)

Reena Roy
as Nagin (female serpent)

Feroz Khan
as Raj

Kabir Bedi
as Uday

Vinod Mehra
as Rajesh

Anil Dhawan
as Kiran

Sanjay Khanna
as Suraj

Sunil Dutt
as Professor Vijay

Mumtaz Askari
as Rajkumari