Peo and her friends will do whatever it takes to keep Sealand – their island home – safe. They all have magical powers connected to the four elements: air, water, earth and fire. And fun and smart Peo is learning that her earth skills are stronger than she knew…

Peo is shocked to find that she can talk to trees when she hears a call for help from a nearby island. The Elementals set off straight away, but when they arrive, all the trees are gone… Can they work together to solve the mystery and save the trees?