Daily stability, disaster strikes → The whole city is closed and isolated from the world → Lack of supplies and people's hearts are broken → Survive as a team and resist predators → Clean up traitors in the team and backstab villains → Strive for survival resources and build temporary safe zones → Fight against external evil forces and resolve layers of crises → Wait for external rescue and self-rescue to break the situation → Post-disaster liquidation and accountability, punish the evildoers → Rebuild the city, take root and establish a career, nirvana and rebirth, complete the closed loop