Grimsdon is in ruins. Three years ago a massive wave broke its barriers
and the sea flooded this grand city. Most were saved, some were
lost--and some were left behind. Isabella Charm and her best friend,
Griffin, live with three other children in the top of an opulent
mansion. They've survived with the help of Griffin's brilliant
inventions, Isabella's fighting skills, and their vow to look after each
other. But what will happen when a newcomer arrives in his flying
machine? Grimsdon is full of hidden perils, from bounty hunters to
sneaker waves. Could Xavier's daredevil risks put all their lives in
danger?