The story follows Sonu Dilli (Emraan Hashmi), a street-smart, small time arms dealer in Delhi who has the gift of gab. When he is interrogated by a tough cop, ACP Pratap Raghuvanshi (Randeep Hooda), he turns informer for the latter. Although helping Pratap puts Sonu in jail for a little time, he continues to purvey the ACP with information about illegal arms racket as he has no other choice. But when Sonu falls in love with Dr Jhanvi (Esha Gupta) and manages to woo her, he wants to leave the life of crime and settle down. However, Pratap, who is hell bent upon finding who the leader of the arms racket is, persuades Sonu to continue being his informer by promising him protection and a good life afterward.