Two years after selecting to not kill the person who killed his son, former police sergeant Leo Barnes has develop into head of safety for Senator Charlene Roan, the entrance runner within the subsequent Presidential election attributable to her vow to eradicate the Purge. On the evening of what ought to be the ultimate Purge, a betrayal from inside the authorities forces Barnes and Roan out onto the road the place they need to combat to outlive the evening.