Blackout. Three dead bodies. Everyone's terrified. The secrets unravel like Christmas presents. And Imogene confronts her mother's killer.

Imogene walks in Rufus’s shoes, revisiting the investigation into her mother’s murder eighteen years ago.

Imogene is betrayed by someone close to her as more victims fall prey to Viktor Sams.

Who is Viktor Sams? Imogene and Sunil pursue a lead in Malta, while Rufus teams up with Leila and Teddy.

As the manhunt for Jules intensifies, Imogene uncovers his criminal past… and finds a new witness.

Interpol seizes control of the investigation. Rufus and Imogene must now investigate the Colliers in secret.

Rufus interrogates each of the major players on board. They're all hiding something… even Imogene's best friend.

When a guest is murdered on a luxury ocean liner, Imogene Scott becomes the only suspect in an impossible crime. She didn't do it. So, who did?