Aakhari Decision (2010)

Arjun is an assassin who operates internationally and works for India-based Victor Chaku. He is in love with Manasi, who wants him to quit, and he accordingly approaches Victor with this request. Victor is willing to conditionally let him quit, and even pay for his marriage, provided he carries out one last assignment. Arjun accepts and accordingly sets out to kill Mumbai Police Commissioner Shyam Singh, who is traveling by train to Kaliyapur to visit an ailing friend. Arjun manages to secure a seat opposite Shyam but finds that his movements are being monitored by Victor's goon, David D'Souza, who is also aboard. Arjun sets out to carry out his gruesome task not knowing that a passenger, Rajeev Chowdhary, is not who he claims to be.