Last night there were a thousand passengers on this ship. Where have they all gone?

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 ...