Seventeen year-old Carrie Garland wakes suddenly in her cabin aboard the famous cruise liner, the Queen of the Ocean. It is four thirty in the morning, and she is alone.

As she searches for her family she starts to notice odd things, like new paintings in the gallery, an old-fashioned pub in the Atrium and for some reason all the decks are numbered "thirteen".

Why is the clock on her phone stuck? Why has the ship's name suddenly changed to the Moon Princess? Why are so many passengers dressed in old-fashioned clothes? What are that battleship and pirate sloop doing, lurking on the horizon? When will the sun finally rise?

And where are her family?

Carrie soon finds herself at the centre of a mystery that is literally out of this world.