该剧设定在主线剧情的五年之前，海豹突击队员本·爱德华兹踏入了中情局的黑暗战线。当他一步步走入灰色地带，就越发难以抵挡内心日益觉醒的黑暗冲动。每个人体内都住着两头狼——一光一暗，相互争斗。最终胜出的会是哪一头？

In the final season, Jason Hayes struggles to balance his warrior’s existence with the responsibilities of single fatherhood. Ray Perry, his trusted second in command, questions whether he will be able to leave the battlefield behind as his retirement nears. Dedicated door-kicker Sonny Quinn battles against changing tides as Jason and Ray’s shifting focus means that other teammates must shoulder more responsibility. Both Omar Hamza and Drew Franklin find diving into work an effective way to distance themselves from their past traumas. Vital to mission success is Lieutenant Lisa Davis, a no-nonsense officer who ushers the team into a new era of warfare against powerful rivals for supremacy on the world stage. Ripped away from their loved ones at a moment’s notice to be deployed across the globe, Bravo team remains dedicated to their duties. Even in the face of overwhelming odds, they know this is the price to keep the families they left behind safe.