Unpredictable, chilling, and incredibly atmospheric — this thriller won’t let you go until the last page.
Travel journalist Laura Blacklock is sent on a dream assignment — a week-long voyage aboard a luxury cruise ship. The Aurora sets sail, and Lo enjoys the fresh North Sea air, stunning views, and elegant company — only select guests have been invited aboard. But the idyllic trip shatters quickly. On the very first night, Lo hears a splash — as if a body has fallen overboard. Looking out, she spots a dark stain on the railing of the neighboring cabin’s balcony — a stain that disappears within minutes, as if it had never existed.
Lo alerts the ship's security chief, who promises to investigate. But the next morning, all guests and crew are accounted for — all but the mysterious woman from the adjacent cabin, whom no one else has seen. Did she even exist, or was she just a figment of Lo’s imagination?
Lo is determined to prove there’s been a murder — and perhaps the killer is still onboard. Meanwhile, the Aurora sails farther into open waters. And Lo sees a message written in condensation on the glass: STOP DIGGING…
