While Luanne and Heatheria enjoy a day off from fighting Evil by fishing on La Orilla beach, Luanne accidentally hooks a swimmer with her fishing rod--only to discover that she has hooked their next adventure, as a mermaid ends up asking for their help in vanquishing Mantene, the Sea Witch of Oceanus.Marina tells Luanne and Heatheria that only the "Chosen One of the Sea" is able to help the three of them destroy Mantene, and the mermaid has been searching...