New Year's Eve, 1932.

Hercule Poirot and his good friend Inspector Edward Catchpool arrive on the Greek island of Lamperos for a little holiday…or is it?

Catchpool suspects Poirot has a different reason for being there — one he won't reveal. As the clock ticks towards the New Year and a festive guessing game takes a sinister turn, can Poirot stop a murderer who is determined to strike before midnight?