The Little Mermaid

After escaping the clutches of the Sea Witch, Erica finds herself captive once more. This time it's to a far more sinister entity. Rather than enslaving her, it seems Erica is a key element in horrific experiments that she is not expected to survive. Despite her best efforts, it seems she cannot escape without the help of her family. But saving their daughter may endanger all of Atlantis. Who will sit on the throne if Erica gains her freedom?