Chase McCain, a disgraced officer, returns to Lego City after two years away to confront an unwelcome homecoming: his old nemesis Rex Fury, a dangerous criminal he once helped convict, has escaped from prison. Tasked with recapturing the fugitive, Chase partners with a well-meaning but bumbling rookie named Frank Honey and relies on the expertise of police technician Ellie Phillips to track down leads across the city. His return is complicated by personal entanglements—his ex-girlfriend Natalia, now in witness protection due to Chase's actions during the original trial, refuses to help him, while his new police chief views him as responsible for the entire crisis. Undeterred by the obstacles, Chase pursues Rex Fury through Lego City's various districts, determined to stop the criminal before he can cause further harm.