BEFORE THE DEVIL KNOWS YOU’RE DEAD concerns a New York family with a roiling undercurrent of dysfunction. The eldest son Andy is a frustrated drug-abusing stockbroker who is unable to satisfy his gorgeous wife. The youngest son Hank is passive and struggles to make alimony payments. Their parents live in Westchester and operate a small jewellery store. Their lives begin to unravel when Andy approaches Hank about pulling off a heist that will seemingly solve all of their monetary problems. Everything about this idea is risky yet Andy convinces his timid younger brother that this is his only way out of his current situation. Naturally their plan falls apart resulting in a series of tragedies that they never could have predicted.