Charmed by the residents of Tressock, Scotland, two young missionaries accept the invitation to participate in a local festival, fully unaware of the consequences of their decision.

Former undercover police officer Jack Adleth returns to London seeking those who tried to have him killed in Amsterdam.

Jack is an undercover cop infiltrating a criminal gang. Things go pear-shaped when Jack's chancer pal does a runner with a box belonging to the boss and ends up in a perilous situation which threatens to explode into disaster.