Aamir Khan plays an investigation officer, Inspector Shekhawat, who is informed about the accident and subsequent death of a superstar. The case turns into a life altering chase for Inspector Shekhawat when he is forced to reel under the repercussions of a disturbed married life [Rani Mukherji] and come face to face with his suppressed grief.
Being on his investigative quest, Inspector Shekhawat meets a sex worker [Kareena Kapoor], who further adds shades of mystery to the puzzle. What looks like a simple car accident investigation turns into a haunting mystery as further investigations show many anomalies were stringed to the death of the victim.