Emma, Cleo and Rikki are sixteen-year-old girls growing up. Emma’s confident and athletic, Cleo is slightly insecure and awkward. Rikki is ‘different’ - the new girl - aloof and smart.
Because of Rikki, the girls find themselves stranded at sea, floating towards mysterious Mako Island. The three girls find themselves exploring the jungle covered island before becoming trapped in an ancient cavern under a volcano. Discovering an underwater channel, they decide to swim to safety. As they enter the pool, the light from a full moon the water, creating a mysterious glow.