Life for Amy is not worth living anymore; she has been brutally attacked; her nightmare of an abandoned child is seeping into her reality. There is only one person who can stop Amy's mission for death, Stephen. However, what Amy doesn't realise is falling helplessly in love with him will just lead her down a dark and deadly path and right into the middle of an angelic war.
Erik invites both girls on a sunset boat trip and Alison manages to have a decent time. Until the storm hits and the boat is shipwrecked on a small island, leaving Erik missing and the boat captain dead.
In the morning light, Alison and Pom find themselves on the lost island of Atlantis. Only one problem: now that the girls know the secret of the island, the Atlanteans don’t want them to leave. They're stuck with corsets, full-skirted dresses, and the strange steam-driven contraptions that are just a way of life for the islanders.
When a plot by the ruthless army Captain to take over the island and declare himself General over all emerges, an underground group promises to return the girls to the mainland if they can help stop him. They'll go through a mountain, literally, to find the Book of Blue, a book that will explain how to make ‘the stars fall sideways' in order to save the day and earn their freedom.