

Senior Police Inspector Surjan "Suri" Singh Shekhawat ( Aamir Khan) with his assistant Devrath Kulkarni ( Rajkummar Rao) begins an investigation. Surjan's personal life has been in turmoil ever since his 8-year-old son, Karan, recently drowned during a family outing.

His wife, Roshni ( Rani Mukerji) is still grieving and Surjan has developed a guilt complex which results in insomnia. Surjan learns that on the night of Armaan's accident, Armaan was travelling with ₹2 million in cash, which is missing. Armaan had given the money to a blackmailer, a pimp named Shashi ( Subrat Dutta). Three years back, Shashi had performed a cover-up for Armaan and his friend Sanjay ( Suhaas Ahuja).
