Zombies suddenly broke out, the campus instantly fell. High school sophomore boy Wang Peng accidentally got trapped in the girls' dormitory, squeezing in a room with Shen Jiajia and seven others. Water is running out, outside the door are zombies slamming the door, and on the other side of the playground another group of people are waiting to pick up ready-made gains. No protagonist halo, no reinforcements, only a group of teenagers. Wang Peng must take everyone out alive before dawn from that drainage ditch on the north wall that no one has ever walked.