The lives of those residing in the isolated town of Burnt Sparrow, New Hampshire, are forever altered after three faceless entities arrive on Christmas morning to perform a brutal act of violence-a senseless tragedy that can never be undone. While the townspeople grieve their losses and grapple with the aftermath of the attack, a young teenage boy named Rupert Cromwell is forced to confront the painful realities of his family situation. Once relationships become intertwined and more carnage ensues as a result of the massacre, the town residents quickly learn that true retribution is futile, cruelty is earned, and certain thresholds must never be crossed no matter what.