It’s been 20 years since the zombie virus spread. Yuyeon, leader of Team A from the armed organization A/Z—responsible for maintaining order—and Ryung, one of the team members, are attacked while inspecting a landfill after hearing suspicious noises. —“Sunbae... What do we do?” —“I was bitten.” Ryung is bitten by an unusually-looking zombie while protecting Yuyeon. Feeling strange, he tries to take his own life... but... —“Huh... what?” For some reason, he doesn’t die—and remains sane. —“It’s weird, but every time I see sunbae... I feel thirsty.” —“It can’t be hunger.” —“If it were sexual desire, I could at least understand that.” Maybe... this is even more dangerous.