Police Inspector Steve Trent is called to the Radford Arms, a high-rise apartment building that has been taken over by a bank and its apartments now-unoccupied. There, the caretaker "Pop" Daley, leads him to an apartment where Trent finds the dead body of world-champion fighter 'Kid" Roberts. Also present are William Malcolm, Daley's unemployed nephew living in one of the "unoccupied" apartments, and Sally Grey, an unemployed secretary just in from San Francisco, also occupying an apartment unknown to the caretaker