During a 12-hour period when all crime - including murder - is legal, a group of seemingly unrelated characters cross paths in a city in an altered America ruled by a totalitarian political party. While the clock winds down, some will fight, some will hide, others will embrace what it means to purge to its fullest extent - whether for revenge, personal gain, protection, or unadulterated glee. As each character is forced to reckon with his or her past and plot how to better their futures, they soon discover how far they will go on Purge Night.