Lin Mo due to game update accidentally crossed into Star Trail City-State world, becoming the character Moyan he controls. From initial bewilderment and panic, to being chosen by the star core to become the guardian, he gathers the star core fragments, leads the residents to build the city-state, resist dangers, and finally activates the Star Trail Lighthouse, unlocking the ability to travel between two worlds. He finds a balance between reality and the game world, both protecting the living creatures of Star Trail City-State and finding his own value, interpreting a legend about courage, responsibility, and goodwill.