I am Coles Rey, a French detective. Pride is the instinct given to me by my high IQ. Loneliness is the sobriety that keeps me at a distance from mediocre people. From the Seine in Paris to the castle in London, from Venice to the old streets of Prague, bizarre mysteries emerge wherever I go. Locked room murders, mysterious symbols, serial suspense, problems that others have no solution for, are just a pastime that I can solve at my fingertips. There is no case in this world that I cannot solve, until the silver coin with the crow engraved on it appears again on the way to investigate the case...