'There's something fishy going on at St Cadoc's Abbey'

The sudden death of Iris Grant's great uncle Petroc gives an ominous new meaning to his warning about strange events on the isolated Cornish island of Morgarrow. Amateur sleuth Gawaine St Clair will need all his detecting skill to find the answers, especially when Iris herself is murdered soon afterwards.

There are plenty of suspects to choose between. Bernard White, the chair of the abbey trustees, wants to build a timeshare resort on the island, aided by his accomplice Roddy Chatham. Local landowner George Pengelly needs the money from selling his land in this deal. And then there is Iris's ex Jake Fletcher who is enraged at being dumped and believes he will inherit her property on the island, while the real heir is Annis Radford, Iris's next-door neighbour. But when a further murder takes place, it seems that none of these could be the suspect.

Gawaine is convinced if only he could work out why Iris was mysteriously wandering around the abbey grounds at midnight, he will be able to find the solution to the crime and reveal the killer.