Paul and Steve plan to relax and take in some fresh sea air on board a luxurious trans-Atlantic liner ... that is until they meet the elusive Sam Portland. After the innocent introduction, grave danger lies ahead for the couple. As events unfold, a concoction of murder, blackmail and terror ensues. Life on board the ship requires cruise control as Temple attempts to get to the bottom of the secret behind Sam's lost years ... And just who is Madison?