Plot summary
Arch Hammer is a con man who can change his face to look like anyone he chooses. He walks into a nightclub, where he impersonates deceased trumpeter Johnny Foster to steal Foster's grieving girlfriend Maggie, a sultry songstress.
Next, while impersonating murdered gangster Virgil Sterig, Hammer pays a visit to Mr. Pennell, to extort money; Pennell is the man who had Sterig killed. Pennell sends his men after Hammer.
Trying to escape down an alley, Hammer sees a poster of boxer Andy Marshak, and changes his face to the fighter's. Pennell's men are fooled. Thinking he is in the clear, he runs into Marshak's father at a street newsstand, who mistakes him for the son who broke his mother's heart and "did dirt to a sweet decent little girl who would've cut off an arm for him." As Mr. Marshak reels off the reasons why he hates Andy and his punk behavior, Hammer pushes the old man out of the way and returns to his hotel room. A detective comes by to pick him up for questioning; together, they leave for the police station. As they enter the hotel's revolving door, Hammer again assumes the boxer's appearance. The detective rushes back into the building to find Hammer.
Marshak's father is standing on the street, with a gun on Hammer. The con man tries to demonstrate that he is not who the old man thinks he is, but before he can concentrate and change his face, Mr. Marshak shoots him. As Hammer lies dying, his face shifts from one person to another until he dies wearing his own face.
Credits
Adapted from Wikipedia contributors, The Four of Us Are Dying. Paragraphs and formatting adjusted; illustrations, reference markers, block quotations and non-story material omitted.