Orlando Edison is a stockbroker using London's infatuation with foreign mining ventures to make a fortune. He has curried favor with the nation's most respected aristats, even inviting three influential investors—known as the Merry Gentlemen—to be part of his latest enterprise. Edison is welcomed in the highest circles and moves with ease among the rich and powerful. But a few days before Christmas, he is found murdered.
Inspector Witherspoon and his household are looking forward to the festive season. But they all know their duty, and led by the intrepid Mrs. Jeffries, they plan to see justice served for the holidays...

Mrs. Jeffries keeps house for Inspector Witherspoon...and keeps him on his toes. Everyone's awed by his Scotland Yard successes—but they don't know about his secret weapon. No matter how messy the murder or how dirty the deed, Mrs. Jeffries' polished detection skills are up to the task...proving that behind every great man there's a woman—and that a crimesolver's work is never done.