Veteran narcotics detective Eugene "Mack" McCanick (David Morse) tracks a young ex-con named Simon Weeks (Cory Monteith), who knows the dark truth about the cop's past. To everyone but McCanick, it appears that Weeks has paid his debt to society. Meanwhile, McCanick remains convinced otherwise. Now, over the course of one sweltering day in the city, McCanick and his partner Floyd (Mike Vogel) will go behind the back of the chief of police (Ciarán Hinds) in order to catch Weeks. All the while, the truth about Weeks, and the secret he harbors, slowly comes to light.