After two hours of waiting, the group finally realizes that the fox is hiding in the air raid shelter. The brothers decide to go in and kill the fox, but only the murderer gets a reward. They're brothers, and they're not going to let anyone kill them. They decide to leave the rear defense of the group to the fox. He asks who the brother is, and he's surprised to find him. He's going to release poison gas in the sealed room and let the group live for a while. Then he'll let them go. He tells them to split up into two groups, one to find the escape route and the other to heal