20 years have passed since the zombie virus outbreak. Yoo Yeon, the leader of Team A from the armed security group ‘A/Z,’ and her teammate Ryung are investigating a suspicious noise at a landfill when they’re suddenly ambushed. “Sunbae… what do we do?” “I got bitten.” While shielding Yoo Yeon, Ryung is bitten by a strangely mutated zombie. Sensing changes in his body, he chooses to end his life before fully turning—but... “Huh…?” For some reason, he doesn’t die—and more surprisingly, he retains his consciousness. “Weirdly enough… I only feel this thirst when I see you, sunbae.” “It can't be hunger.” “Unless… it's something more primal.” This might be even more dangerous...