 A man on trial for murder claims that the victim was shot through a window from a fire escape, and that he fired at the killer. The defendant s lawyer 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.