The story takes place in Anpanman World, where preparations are underway for the annual Star Festival. A mysterious egg from Baikinman's trash unexpectedly hatches, releasing a boy named Kurun, who has no memory of his past. Kurun joins in local activities, but his carefree lifestyle is disrupted when dark stars start falling from the sky. Anpanman suspects something is amiss at the Star of Life and decides to investigate.