Summer is coming to a close on beautiful Sea Isle in Scotland, and Dr. Emilia McRoy is celebrating one year since her big move. With a weeklong festival to end the season, the town gathers for a magical ride on the newly refurbished Storyteller's Train but the launch's success is dampened by an unexpected death. What appears to be a case of deadly allergies is soon revealed as murder. As Emilia, her assistant Abigail, and the local constable Ewan McGregor unravel the mystery, the killer sets their murderous intentions on them. If they want to survive, they will need the help of all of their friends, before they become the latest victims.