A soldier faces a zombie outbreak during military service. His girlfriend, an engineer, navigates zombie-ridden Seoul. Both fight through the undead-infested city, striving to reunite amid the chaos.

In the ultimate test of marriage, an agent-turned-househusband gets tangled in a perilous mission with his detective wife, who's clueless about his past.

While under heavily armed guard, the dangerous convicts aboard a cargo ship unite in a coordinated escape attempt that soon escalates into a bloody, all-out riot. But as the fugitives continue their brutal campaign of terror, they soon discover that not even the most vicious among them is safe from the horror they unknowingly unleashed from the darkness below deck.