When the Happiness Club comes to town, Maisie Sue sees it as an opportunity to rediscover romance, Jock McLean regards it with suspicion, and Jemima and Dave look forward to taking part in new activities with their friends. Amaryllis and Chief Inspector Smith go along to keep an eye on developments on their patch. As for Christopher, he misses the start of the excitement because of a prior engagement - walking the Fife Coastal Path with a figure from his past.

But before anyone has had very much fun, it becomes clear that while the Happiness Club brings good times to some, to others it offers only desolation and death.