Billy Carlyle is a professional fighter starting to lose. His eyes cut too easily and his friends Gabriel, an aspiring actor, and Sam, an artist preparing for her first gallery show try to persuade Billy to leave the ring. From the streets of Manhattan to the gyms of Paris, from struggling with hard pasts to harnessing the primal pull, 'Both Members of the Club' is a story of friendship and ambition and violence set against the world of boxing, a place where bodies get tested and truths are exposed.