The powers of good are pitted against the forces of evil as the Duc de Richelieu wrestles with the charming but deadly Satanist, Mocata, for the soul of his friend. Mocata has the knowledge and the power to summon the forces of darkness and, as the Duc de Richelieu and his friends remain within the protected pentacle, they are subjected to ever-increasing horror until thundering hooves herald the arrival of the Angel of Death.
British reporters suspect an international cover-up of a global disaster in progress... and they're right. Hysterical panic has engulfed the world after the United States and the Soviet Union simultaneously detonate nuclear devices and have caused the orbit of the Earth to alter, sending it hurtling towards the sun.
A hard-nosed Chicago cop is sent to London to bring back an American mobster being held for extradition. Brannigan in his Irish-American way brings American law to the people of Scotland Yard but has to contend with a stuffy old London first.
