It is 2021. In an alternate reality, London has not changed much: the rainy weather, in which mysteries abound in the mist during passers-by obliviousness, is still the prose of their lives. Arthur Oliver, a private detective who has already seen his best professional years, unexpectedly becomes a part of one of London's dreadful puzzles: he must find out why Richard Kersey, a businessman on the local coffee market, disappeared without a trace.