Johnny Gaddaar (2007)

The plot revolves around a group of five men, the oldest of whom (Dharmendra) is over 60 years old and the youngest of whom (Neil) is in his twenties, who have the opportunity to make a fortune through what appears to be a simple trade of contraband for money on a train. However, one of the gang members is murdered before he can complete the deal, and the money he was carrying vanishes. Then there's a ruthless hunt for the thief and murderer, who must be among them because no one else could have known about the heist. Johnny Gaddaar is an intriguing blend of greed, betrayal, deceit, lust, desperation, and murder that is not your usual whodunit.