Aatank was an action thriller released in the year 1996. The movie was produced by Prem H.Lalwani and directed by O.P.Kohli. Dharmendra and Hema Malini were casted in the lead roles. The star caste of the movie also includes Nafisa Ali, Vinod Mehra, Kader Khan, Ranjit, Amjad Khan and Girish Karnad. The movie also stars Ravi Kishen who is now a Bhojpuri superstar. Sachin Bhowmik wrote the screenplay for the movie.

In the movie, Vinod Mehra as Peter plays the friend of Dharmendra Jesu. Jesu is an orphan boy whereas Peter is living with his relatives. Kader Khan plays the character of D’Costa whereas Girish Karnad plays the character of Inspector Khan. They live in a village alongside the coastal line in India. Their only source of livelihood is fishing. Alphonso played by Amjad Khan is a local gangster of the village. One day a villager finds black pearl along the coastline, which gets the people of the village excited.

When Alphonso comes to know about this, he asks all his divers to dive in the ocean and retrieve all the pearls. This act disturbs the balance of the ocean. Meanwhile Jesu meets Suzy played by Hema Malini and they fall in love with each other. They get married to each other. One-day Suzy goes missing after she had gone for a swim. The villagers carry out a manhunt and they find parts of human body on the coast. In the end it is revealed that the there is huge shark that is eating up the people and destroying the livelihood of the villagers. The shark seems to be indestructible.