Ballerina Allie Larkin's ankle is almost healed, but for now, she's keeping the temporary job at Aunt Gully's Lazy Mermaid Lobster Shack, famed for its mouth-watering lobster rolls and clam chowder. One day, Aunt Gully decides to put her friend's pet lobster on display, and the whopping twenty-seven pound Lobzilla becomes a media sensation - even more so when he is kidnapped. Allie is never one to stand by when something nefarious has happened, and she's determined to track down the mammoth crustacean. When she finds Lobzilla, he's on top of the dead body of the patriarch of the oldest and proudest family in Mystic Bay. But who would want to kill him - and how did a lobster end up on top of him? It's up to Allie to solve this confounding crustacean puzzle.