The Halloween costume party at the Ocean Café falls on a full moon. Zac and Cam make preparations to go for the trident. Zac tells the girls that he isn't going to Mako Island, he'll be at the party. The girls are suspicious and plan to keep an eye on him all night. Lyla and Nixie cover Carly's waitressing shift for the night while Sirena performs with David and a live band. They keep a close watch on Zac but he makes a dash for Mako and gives the girls the slip. Can they stop him from getting the trident?
—grrlpunk