Marvin Flait may be the greatest detective who managed to catch a cannibal clown or correctly identify a mid-century modern wardrobe. But there is one mystery he still can't solve - his family. Now, returning to Grimsburg, a town where everyone has their own secret, Flait will search for any clue to redeem himself in front of his ex-wife, whom he never stopped loving, even if it means reconnecting with the son he never bothered to get to know.