After a bank robbery gone wrong, three brothers head for home hoping their Mother (Rebecca De Mornay) can provide them with a getaway. The youngest brother Johnny (Matt O'Leary) has been shot and their back-stabbing former partner has gotten away with all the cash. But when the brothers get home they find that all their stuff is gone and their Mother is nowhere to be found: She lost the house months ago in a foreclosure. The new owners Beth and Daniel Sohapi (Jaime King and Frank Grillo) and their guests gathered for an ill-timed birthday party become the brothers' unwitting hostages. Not long after Mother arrives along with the boys' sister Lydia (Deborah Ann Woll) and it soon becomes clear that Mother will do absolutely anything to protect her children.