A holiday party takes on a sinister aspect when the colourful assortment of guests discovers there is a killer in their midst. The owner of the substantial estate, that old Scrooge Nathaniel Herriard, is found stabbed in the back. While the delicate matter of inheritance could be the key to this crime, the real conundrum is how any of the suspects could have entered a locked room to commit the foul deed. For Inspector Hemingway of Scotland Yard, the investigation is complicated by the fact that every guest is hiding something, throwing all of their testimonies into question and casting suspicion far and wide. This clever and daring crime will mystify readers, although the answer is in plain sight the whole time.