Follow two mermen, Kappa and Siren, as they reject their destinies and embark in an adventure as big and unpredictable as the ocean itself -- and a romance that nobody could have predicted.
The sharks want Kappa dead, and time is running out for Prince Siren to save him. Queen Susca knows Siren doesn't have the courage to kill Kappa, and for the sake of the kingdom, she's willing to do the deed herself.