
As heir to her father Neptune’s underwater kingdom, mermaid Aria’s future seems set in stone – but is there more for her out there, maybe even above the waves? To find out, she does a deal with her aunt Hydra who transforms her into a human, much to her father’s horror. But it soon becomes clear that Hydra may not have her best interests at heart – unbeknownst to Aria, she wants the throne for herself. Luckily, Aria has many friends that help her out, from her loyal companion Finn to her father’s advisors, Claude and Shelly. She also meets new ones along the way, including Chips the seagull and a human called Caspian, whose curiosity for the sea mirrors hers for the land.