Stanley manages his boxer brother Lion but when a devastating loss in the ring leaves the pair in debt, an opportunity to recoup the cash leads to a series of misadventures that threaten to break the bond between them.
Charlie Hunnam
as Stanley Kaminski
Jack O'Connell
as Walter 'Lion' Kaminski
Jessica Barden
as Sky
Fran Kranz
as Buck
Jonathan Majors
as Pepper
John Cullum
as Yates
Owen Burke
as Meadows
Meredith Holzman
as Darlene
Nick Mullen
as Clay Carlson
Jere Shea
as Stepfather McGinty
Patrick M. Walsh
as Lefty Denunzio
Lucien Spelman
as Roman
