Lukia and her friends return to Laurent’s castle to rescue her mother, only to be transformed into adorable little animals by the powerful witch Circe. Helpless without their mermaid powers, they’re no match for Laurent. In a desperate bid to save her mother and her friends, Lukia agrees to stay behind as his prisoner in exchange for their freedom. But when they’re finally alone, Laurent stuns her with an altogether different offer: become his bride.