What starts off as a dreadful murder in London soon becomes a race against time to save humanity.
Less than three months into Stella’s one year guest professorship in London, her husband, retired FBI consultant, Timothy Carter, runs into an old friend while catching a taxi. It’s raining and both parties are late for their respective appointments. They make a lunch date for the next day but that meeting never happens because mere hours after meeting his friend Gregory Semple, Carter discovers he’s been murdered at the British Museum.
The police question Carter but other than his chance running into Greg, he can’t shed any light on who’d want to kill Gregory Semple. A few days later Carter receives a package with a mysterious black-hand-imprinted parchment, addressed to him, from his now-deceased friend. Impulsively and thinking it a joke, Carter measures his own palm against the black imprint and suddenly, unknown to him, a clock somewhere started ticking a countdown to doomsday.