A luxury cruise liner, abandoned with no crew, steaming into the mid-Atlantic. And you are the only passenger left on board. Caz Ripley, a cafe owner from a small, ordinary town, boards the RMS Atlantica with her boyfriend Pete and a thousand fellow passengers destined for New York. The next morning, she wakes to discover that everyone else on board has disappeared. And that's just the beginning. Caz must prepare for a crossing that will be anything but plain sailing.