Earth's counterintelligence expert Sadler is on the moon, where tensions with Earth are high and undercurrents run deep. Disguised as an "auditor," he investigates the mole leaking information. Trapped in a desperate situation where everyone is hostile and information is tightly controlled, he must go from being at odds with Yue Xi, a genius scientist native to the moon, to joining forces with her. Together, they must expose the first "traitor" controlled by extraterrestrial forces. In the process, they will uncover the tip of a terrifying conspiracy from an alien civilization, one that goes far beyond the conflict between Earth and its colonies. Sadler is on the moon, where tensions with Earth are high and undercurrents run deep. Disguised as an "auditor," he investigates the mole leaking information. Trapped in a desperate situation where everyone is hostile and information is tightly controlled, he must go from being at odds with Yue Xi, a genius scientist native to the moon, to joining forces with her. Together, they must expose the first "traitor" controlled by extraterrestrial forces. In the process, they will uncover the tip of a terrifying conspiracy from an alien civilization, one that goes far beyond the conflict between Earth and its colonies.