Deputy Marshal Mason Raines must protect President Glass and in order to do so, he must first find a way through The Greenbrier bunker's blast doors. Terribly outnumbered, Mason, Bowie, Leila, and three young cadets must use every bit of skill and courage they have to make one valiant last stand. Meanwhile, Tanner and Samantha embark on a mission to kill President Pike and dismantle his empire. In order to do this, they must align with an army of hideous surviviors.