A message in a bottle brings an SOS call to the village of Tannengrün. In this forest live four friends who have already experienced many adventures together: Little Owl Helmine, Squirrel Mia, Mole Toby, and Badger Benno. The news comes just in time for Helmine, who cannot stand boredom. Unfortunately, there are some really sad updates. Sea turtle Eddi and Fox Oskar are in big trouble. Helmine met the two on a beautiful green island, her very first travel destination. Back then, she bravely flew off alone and was the first to leave the village of Tannengrün. And now, this enchanting island is in danger. Dolphin Post pushed the message from her friend Eddi across the sea and through the waves. For Helmine, there is only one thing to do: fly off immediately. However, her three friends secretly follow in a self-built canoe. Their motto is "Together we are strong," and all four plan a brilliant uprising together with the other island residents. With funny and clever ideas, they succeed. You will find out what or who the island is being saved from in the incredibly imaginative and humorous third volume of the series 'Animal Friends'.