Linville Hagen, on trial for murder, claims that the victim Nick Danello was shot through a window from a fire escape, and that Hagen fired at the killer. The defendant's lawyer Leo Campbell claims that he can bring in a witness, a woman who was beaten up by the victim. But the woman can't be found. When she's finally tracked down, Inspector Queen, Ellery and Frank Flannigan hear a gunshot from outside her window, break down the door and find the woman lying unconscious -- shot from the fire escape.
—Peter Harris