A man who believes he has put his mysterious past behind him cannot stand idly by when he meets a young girl under the control of ultra-violent Russian gangsters.

The story of the 2013 Boston Marathon bombing and the aftermath, which includes the city-wide manhunt to find the terrorists responsible.

When a law school student hails an app-based car service and is assaulted by her driver, she becomes a NetCar driver herself and goes on a vigilante crusade to find and catch her assailant.