4 mental patients formulate the plan to rescue their kidnapped doctor and teach the kidnappers a lesson.

Scientist Ramu and his wife Uma (Nazira) live with their four-year-old son Leher in the jungle where he carries out experiments. He has discovered the elixir of life. Lions attack their house killing him, while his wife goes mad with grief. Ramu’s son, Leher, and their little dog Moti, escape with the help of a half-man, half-ape called Dada (Boman Shroff). Several people arrive in the jungle fifteen years later from the city. One of them is Ramu’s father with his adopted daughter, Leela. Bihari, one of the people in the group wants the formula for his own purpose. The formula was put in a pendant around Leher’s neck by his father before he died. Leher now grown-up and known as Tarzan (John Cawas), has been brought up in the jungle and there are some amusing incidents between Leela and Tarzan, due to his lack of language skills. Tarzan saves Leela from Bihari’s unwanted advances.

Dara and Karan, the sons of two of the victims of dacoit Jogi Thakur, wait many years to exact their revenge. When the Thakur's colleague Raja Singh cheats him and runs away with his loot, Jogi is arrested and sentenced for life imprisonment. Years later Jogi escapes from the prison to get hold of Raja and take back his booty, but finds his face on all the posters in the village to find him dead or alive with a reward of fifty thousand rupees. When Karan gets to know Jogi has escaped he goes looking for him. Dara also join hands with Karan to even the score with the dreaded dacoit.