Two thieving teenage brothers, stealing money to help their sick mom, match wits with a troubled security guard stuck at the bottom of a forgotten well.

All the rules are broken as a sect of lawless marauders decides that the annual Purge does not stop at daybreak and instead should never end.

Aaron Falk returns to his drought-stricken hometown to attend a tragic funeral. But his return opens a decades-old wound – the unsolved death of a teenage girl.