On the night before Christmas, cruel, tyrannical, filthy rich Simeon Lee is found in his locked bedroom with his throat cut. Now Hercule Poirot must put his deductive powers to the test to solve one of his most chilling cases - and to prevent a clever killer from spilling more blood.

Christmas Eve, and the Lee family’s reunion is shattered by a deafening crash of furniture and a high-pitched wailing scream. Upstairs, the tyrannical Simeon Lee lies dead in a pool of blood, his throat slashed. When Hercule Poirot offers to assist, he finds an atmosphere not of mourning but of mutual suspicion. It seems everyone had their own reason to hate the old man.