Despite Kai's many accomplishments, nothing is enough to assuage the nobles hoping to deny her the throne. Taking it out from under them won't be easy.
Few mers know sacrifice better than Manu. He'll forfeit anything for Kai to succeed, even if it means denying their newfound affection. Even if it means breaking his own heart.
After all, neither of them has time for romance--Calypso's vile Gloom has evolved. The mers of Atlantis will need new allies if they're to overcome the darkness creeping toward their kingdom. And Kai must truly learn what it means to be a queen if she's to be trusted with Atlantis's safety.