1946 Chicago is filled with trouble; gangsters, thieves, cut throats, dirty dealers & femme fatales. The people of the city have problems, private detective Shamus Elias Stone fixes them, for a price . . . A simple seeming case of a missing actress leads to a tangled maze, as a masked killer takes his revenge. The killer wears the mask of the villainous robots of "Cowboy Robo," Shamus Stone suspects that the popular serial is at the center of this case