Set in Eerie-on-Sea, a seaside town filled with oddball characters and mysteries as murky as its winter fog. A young boy named Herbert Lemon, who acts as a hotel’s lost-and-found director, teams up with Violet Parma, a young girl who is looking for parents she lost as a baby, setting off on an adventure that involves a half-man, half-monster who is said to make dreams come true, and a hook-handed man pursuing them.