Mother knows best. The underwater world of Natatoria is enjoying a long awaited period of peace -- and with it, the merpeople's very first chance to visit human civilization. Ash and Fin's wedding marks the perfect opportunity for the mers to celebrate their newfound freedom. But when they return home to Tahoe to prepare, Ash's absence from the human world has raised more than a few questions about where she's been. When blaming fingers point to Ash...