Morgan begins to settle into Alexandria, when he and Rick come across a rock quarry filled with walkers. Rick holds a meeting on how to deal with this imminent threat, as the walkers will soon break free of the quarry and make their way to the Safe Zone. While making plans, a resident named Carter tries to overthrow Rick and take back Alexandria, but fails. The plan to lead the walkers opposite of Alexandria seems to be effective, when a blaring horn is heard in the distance, caused by The Wolves, and attracts half of the herd of walkers toward the safe zone. Back at Alexandria, the Wolves attack the Safe Zone and begin slaughtering the residents. All members of the Wolves are killed except for a few that Morgan allow to leave, and one that he knocks unconscious. Meanwhile, Rick runs to a near RV while Michonne, Glenn and a few Alexandrians try to head back the the Safe Zone. They reach a town where Glenn and Nicholas attempt to find a nearby building to set on fire in hopes of attracting the herd. Michonne and others leave the town, with a few of the Alexandrians being killed. Glenn and Nicholas are cornered in an alley and jump onto a dumpster. Unable to escape, Nicholas commits suicide, causing Glenn to fall from the dumpster where he is seemingly devoured by walkers. Back at the RV, Rick is attacked by the Wolves that left Alexandria and kills them.