Blood rain descends and the world changes. The radio announces that those who kill will develop "blood scabs" and become a mobile source of pollution. The survivor forum revealed a terrifying rule: the more people with blood scabs in the area, the stronger the monsters spawned nearby! When Chen Mo smashed open his neighbor's granary in order to survive, he only found half a body and a strange text message: "Don't believe the radio!"
During his escape, he formed an alliance with Lin Wei, a retired soldier. They discovered that blood scabs can be turned into weapons, and forces such as the military, chaebols, and the mysterious church have already established a cruel survival game field under the blood scab rules. The truth is peeled off like an onion - the so-called pollution rules are actually a poison breeding ground carefully designed by a certain being. When Chen Mo discovered that his blood scab actually contained the secret to breaking the situation, the strangulation net in the entire ruined city had quietly tightened around him...