When Crispian Davison (A.J. Bowen) brings his new girlfriend Erin (Sharni Vinson) along to celebrate the wedding anniversary of his parents (Rob Moran and Re-Animator’s Barbara Crampton), the worst thing either of them expects is some awkward conversation and an inadequate supply of whiskey. But an evening of sibling rivalry and icy barbs at the dinner table is shattered when an arrow smashes through the window. Enter a gang of killers in animal masks, armed with machetes, axes and a crossbow, who begin to hunt the family down with brutal precision.