Mack and Jesse, a father-son duo in training to be survivalists, find themselves at odds as Jesse prefers to follow his own path. When a sudden zombie outbreak engulfs an office building, trapping those inside, Mack and Jesse stumble upon the chaos while en route to an underground shelter. Despite Mack’s reservations, they decide to intervene. As the zombies infiltrate the building and the office workers fall victim, Mack and Jesse strive to guide the survivors to safety. Will they manage to reconcile their differences amidst the zombie apocalypse and play a role in saving humanity?