Nolan and Irisa arrive in Defiance, where the town is soon divided over the death of Luke McCawley. But a bigger threat forces everyone together: An attack by the Volge.

Rafe & Nolan search underground St. Louis while looking for an escaped convict. Meanwhile, a violent Castithan tradition causes clashes amongst the residents of Defiance.

While investigating vicious Hellbug attacks, Nolan & Irisa realize they are tied to Irathient spirit raiders that have come into town. Meanwhile, Irisa starts experiencing strange visions.

Kenya is kidnapped. Rafe learns that Luke was involved in some mysterious goings-on at the mines and orders Quentin to get to the bottom of it.

Amanda and Nolan take a transport across the badlands to transport a prisoner and join forces with a band of outlaws. A visitor to Defiance must make Irisa confront her traumatic past.

An old war buddy catches up with Nolan at the same time a Castithan criminal with a history of violence enters the picture.

A deadly plague threatens the town; racial tensions rise when the Irathients, who are immune to the virus, are quarantined.

The town of Defiance is shocked when the remains of a leading businessman who went missing almost six years ago, are discovered hidden in the walls of the NeedWant.

Amanda’s mayoral campaign is threatened when Nolan is involved in an accident on the eve of the election, prompting the town to question Amanda’s decision to appoint him as Lawkeeper.

The citizens of Defiance prepare to cast their votes for mayor; Nolan’s past violently rears its head; Irisa must decide whether or not to embrace her destiny.