All Rapunzel wants is to explore, but she can't set foot outside her tower without triggering her curse. At least, that's what her mother tells her, and she has no reason not to listen to her mother, right? But when Rapunzel suddenly winds up in a sea witch's lair, she wonders if this could be her chance: not only to see the world, but also to break the curse that’s always hung over her. . . .

Princess Hana, meanwhile, has her hands full with this mysterious storm wreaking havoc under the sea. As a mermaid, she's pretty sure humans are at fault—especially after her best friend is captured by sailors. But how is Hana supposed to save him when she suddenly finds herself stuck in a very tall tower with no door?

Happily-ever-after couldn't feel farther away. Can Rapunzel break her curse before it is triggered? And can Hana escape the tower in time to save her kingdom?