A nasty old man, his mostly estranged family bearing many a grudge, brought together with a smattering of servants and unexpected guests for a very dysfunctional Christmas in the family mansion. When the old man inevitably ends up dead and some precious jewels go missing there are any number of suspects for the police and Hercule Poirot to investigate. Of course Monsieur Poirot's little grey cells will quickly sort out the truth from the lies and secrets and solve the case.