A series of crimes drives businesses off the rails in Devon, targeting railways both large-scale and small. And a snooker club barman turns detective when two strangers come in and steal money meant for a charity that means the world to him.

Two young girls watch on in fear as their shop-owner dad grapples with a dangerous gunman.

Someone is stealing money from a frail 93-year-old, and any one of a large number of visitors could be the culprit.