In this tightly wound mystery from the author of In a Dark, Dark Wood, journalist Lo Blacklock has been given a dream assignment: a week aboard the luxury cruise ship Aurora, sailing on the picturesque North Sea with a select group of passengers occupying the handful of plush cabins. The sky is clear, the waters calm, and the guests bright and jovial, but soon gray clouds gather, frigid winds whip the deck, and then Lo glimpses a terrifying scene: a woman being thrown overboard. Yet all passengers are accounted for, so the ship sails on despite Lo's alarms.

"A gripping maritime psychological thriller that will keep readers spellbound. The intense final chapters just might induce heart palpitations.""—Library Journal (starred review)