Valora Luck has two things: a ticket for the biggest and most luxurious ocean liner in the world, and a dream of leaving England behind and making a life for herself as a circus performer in New York. Much to her surprise though, she's turned away at the gangway; apparently, Chinese aren't allowed into America.

But Val has to get on that ship. Her twin brother Jamie, who has spent two long years at sea, is there, as is an influential circus owner, whom Val hopes to audition for. Thankfully, there's not much a trained acrobat like Val can't overcome when she puts her mind to it.

As a stowaway, Val should keep her head down and stay out of sight. But the clock is ticking and she has just seven days as the ship makes its way across the Atlantic to find Jamie, perform for the circus owner, and convince him to help get them both into America.

Then one night the unthinkable happens, and suddenly Val's dreams of a new life are crushed under the weight of the only thing that matters: survival.