There's some fishy business happening in the idyllic Cornish village of Mousehole. As a killer begins to make waves, can these new amateur detectives solve the mystery?

Maggie Tyson loves living in the utterly charming village, Mousehole. She spends her days walking the local coastal paths, solving the latest crossword puzzle, and working in the small town's only fish and chip shop.

Looking for a fresh start, Ryan Stepney is in desperate need of a job, and stumbles across a vacancy at the chip shop.

When a body is found by the harbour, shock ripples through the village. And as Ryan was the last person seen talking to the victim, he becomes the number one suspect in the investigation.

Maggie is certain that her new colleague had nothing to do with the murder, so swaps her apron for a magnifying glass, and starts to investigate herself.

Can Maggie prove Ryan's innocence and reel in the killer, before they strike again?