Who is Stephen Leeds - a completely normal person, a madman or an unsurpassed genius who can master a new skill in a matter of hours? To cope with the flow of information, Stephen surrounds himself with a crowd of hallucinations, and each of his imaginary friends is an expert in a certain field, suffering from some kind of mental disorder. Invisible entities help Leeds solve cases that no ordinary detective could handle. Are terrorists threatening people again? Did a National Security employee's cat teleport somewhere? Has a camera photographing the past disappeared from a secret laboratory? Stephen Leeds will solve any problem for a tidy sum if his sanity can bear it, because the detective nicknamed Legion himself has to pay dearly for his successes.