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.