After the apocalypse, the remaining human forces retreated to the underground abandoned subway network. This criss-crossing tunnel is the last home for human survival. {Zhao Ye} As the guardian of the subway tunnel, he patrols day and night to maintain the safety of the tunnel, resist underground threats, and protect the habitat of his compatriots. During a routine in-depth inspection, he accidentally discovered that the main tunnel was connected to a dusty old-world military base. Deep in the base, there was a devastating weapon that could completely blow up the subway network and destroy all remaining humans. As the secrets were revealed, forces from all sides were ready to take action. {Zhao Ye} was forced to embark on a desperate road to protect his fragile tunnel home while preventing the weapons catastrophe.
