http://bit.ly/oIYCdD Synopsis: Police Commissioner Suryadeo Singh (Amrish Puri) is a ruthless law enforcer whose very identify strikes terror in the hearts of criminals. A agency believer in the motto "To get rid of crime, get rid of the criminal" the super cop has only a single weakness - his grand daughter Kajal (Twinkle Khanna) who he loves more than his individual daily life... she is his "Jaan". Unfortunately Suryadeo Singh has a lot of enemies and Kajal is now in acute risk. A gentleman who can encounter demise in the eye is definitely shaken he can't even believe in the police force to safeguard his "Jaan". Soon after a thorough investigation, Suryadeo Singh discovers a educated weapon specialist Karan (Ajay Devgan) who he deems fit to safeguard Kajal. Future intervenes and Kajal falls desperately in enjoy with Karan, even as Karan hopelessly used to keep aloof from her. But no issue how considerably he denies his correct emotions, Kajal had without a doubt turn out to be his "Jaan". But how can he reciprocate her love? The fact haunts him - the horrible fact that he was planted by Suryadeo Singh's enemies and is doomed to murder his own enjoy. "Jaan" is the clash among two ruthless adult males and a youthful innocent lady torn amongst her grandfather and her love for an assassin.