Ever since he was a teenager, the world has labeled BIG a monster. But to his sister LIL, he was simply her goofy and loving protector – until BIG unexpectedly left. Now BIG is an aging but accomplished force in the local mixed martial arts circuit, while LIL keeps tabs on her estranged brother from the shadows, studying every punch he throws. But when she suddenly appears on his doorstep, BIG finds himself reluctantly pulled into a new type of fight: one for forgiveness and love.