In Salt Kiss movie, ex-soldier Tristan becomes bodyguard to his uncle-in-law, a magnetic billionaire who runs an exclusive sex club. Despite his best efforts to stay professional, Tristan's drawn to his boss’s dominance, breaking down his defenses until he finally submits. Under Mark’s seduction, Tristan is pulled into a world of pain and pleasure he never imagined. But his lust for Mark unravels when he’s sent to retrieve Mark’s fiancée… and falls for her too.