Kala Pani.

Based on A.J.Cronin's 'Beyond This Place', this movie narrates the story of an untiring crusade for justice. A young man, learning about his father's wrongful implication in a fifteen-year-old murder, vows to bring the true criminals to justice and release his innocent father from 'kaala paani' (life imprisonment), for which he enlists the help of a press reporter, a retired police inspector and an unwitting prostitute who happens to possess some key evidence.