Two years after choosing not to kill the man who killed his son, former police sergeant Leo Barnes has become head of security for Senator Charlene Roan, the front runner in the next Presidential election due to her vow to eliminate the Purge. On the night of what should be the final Purge, a betrayal from within the government forces Barnes and Roan out onto the street where they must fight to survive the night.

Phil Broker is a former DEA agent who has gone through a crisis after his action against a biker gang went horribly wrong and it cost the life of his boss' son. He is recently widowed and is left with a 9-years-old daughter,Maddy. He decides to quit the turbulent and demanding life of thrill for Maddy's sake and retires to a small town. His daughter fights off a boy who was bullying her at school and this sets in motion a round of events that end in his direct confrontation with the local Meth drug lord. His past history with the biker gang also enters the arena, making matters more complex. But he has a mission in his mind to protect his daughter and he is ready to pay any cost that it demands.

A war veteran plagued by guilt over his final mission teams up with his best friend's widow to infiltrate a dangerous Copenhagen biker gang.

In a future where a special police unit is able to arrest murderers before they commit their crimes, an officer from that unit is himself accused of a future murder.