A British jockey, riding in Norway, has disappeared, and with him has gone a day's takings from the turnstiles of Oslo racecourse. The Norwegian police have found no trace of him, nor have the British, and the case is being filed as just one more unsolved theft. David Cleveland, investigator for the Jockey Club, is a last resort. He goes without much expectation, and finds himself in waters as dark and deep as the fjords.