The Juice-Net cafe is hosting a short film contest based around the theme of 'heroes', and everyone wants to enter. While Rikki and Cleo are roped in to doing a film about Emma's mum, Zane and Lewis hit the waters around Mako Island to film Zane windsurfing. Meanwhile, Rikki isn't convinced that Emma's film idea will win them the prize, so she sneaks off to make a film of her own, featuring some impressive underwater footage of sharks. But when Zane falls off his windsurfer, right in the middle of Mako Island's shark breeding ground, it's Rikki who finds herself being called a 'heroine' when she has to help rescue him!