Yann, a teenager whose best friend is an amazing white dolphin, is now working as intern at Manava, the veterinary and research center run by Uncle Patrick. There he meets Nino, a brilliant but clumsy scientist and his daughter, Maimiti, a teenage computer genius. With the help of Anita, the vet, Yann must make sure the wild animals brought to Manava can be released safely and also take care of the permanent residents, such as Daisy, the mischievous sea lion, Bobby, the shy octopus, and Bubbles, the greedy dugong…
Timeti has completed her apprenticeship as shaman while Auru is still trying to prove that he is the worthy heir to his dad, the village chief.
Our heroes continue to protect their atoll against many environmental threats. They also run into old foes: the billionaire Van Krook, and Terrence Werner, a lawless, tycoon, who roams the seas aboard his impressive submarine.
