At the bunfight following his marriage to Helene Brand, theatrical agent Jake Justus, reflecting that “he had had more than his fair share of homicides”, is unprepared for Mona McClane boasting that she will kill someone “in broad daylight on the public streets, with…plenty of witnesses”. Surely she can’t be serious? And so a bet is struck — powered, no doubt, by the veneer of alcohol that drives so much of Craig Rice’s wild plotting — that, if Mona commits the murder, Jake will prove her guilty of it. And then a man is shot dead on the busiest corner in Chicago during the Christmas rush, with Mona McClane spotted in the vicinity just moments before.