Wudi (played by Jordan Chan) and Sang B (played by Lee Cansen) are two idle hooligans. They usually work at the VCD counter in the mall, making jokes and spending their days leisurely. One day, they were ordered by their boss to go out to pick up a car. On the way back, they bumped into a gangster in a suit. The man had a new biochemical weapon that could turn humans into powerful zombies. The two of them accidentally poured the potion into the man's mouth and took the man back to the mall. At night, the mall was silent. The gangster who drank the potion finally turned into a zombie, killing innocent people everywhere, and the people he bit turned into zombies one by one. How can Wudi and Sang B escape the pursuit of these demons?