"Ordinary college student Im Chan-woo grows tired of his repetitive daily routine, unable to adapt to college life.

A rain of petals blowing toward Chan-woo, who desired a change in his everyday life, changed his reality.

The true identity of those countless petals is something that invades the human brain, eats away the brain, and...

Monsters that pretend to be that human. I am the only one who knows their true identity."