Former Marine Frank Castle takes the law into his own hands while struggling to come to terms with his traumatic past.

A mysterious phone call forces Frank's hand. Meanwhile, Madani goes digging for suspects and Curtis delivers a message.

With Frank in bad shape, Micro calls on Curtis for help. Madani and Russo continue to mix business with pleasure. Lewis stands up for his rights.

As the authorities close in, an exhausted but unbroken Frank vows to put an end to the war that has consumed his life.