Guinevere Evans has a dream summer job: cataloguing books at a castle on a tidal island off the coast of Cornwall. With her perky dachshund Dolly by her side she explores the island’s colourful history, tries fabulous local food and sees the gorgeous sunsets.
But when an old friend of her employer drops in, claiming a rare bejewelled wedding goblet is hidden in the castle gardens, strange events start to take place: several people turn up claiming they have a right to the elusive goblet, and a dead body is found on the beach.
An unfortunate accident, or does this death relate to the struggle for ownership of the goblet? Is there even a goblet?
Guinevere and Dolly dig in and discover plenty of motives to lie, steal and yes, maybe even kill. Can they prove what really happened to the victim and what became of the precious rubies that are at the heart of the mystery?