Crime novelist Edward Hope has recently purchased Fen Court, a beautiful country residence on the Essex marshes. However when he and his friend Nancy Johnson go to visit the new property, they find themselves caught up in a real-life murder mystery when three bodies are discovered in the ornamental fish-ponds. Finding himself high on the list of suspects, Hope must work in collaboration with Inspector Brews of the local police to unmask the true culprit behind this terrible deed….