Tim, Benni, Sophia and Fenja – they are the Chanterelles! The little gang has a great camp in the middle of the forest where they meet every afternoon to play and explore the surroundings. But one day Fenja makes an unnerving discovery: a big dog is straying injured through the forest without a leash … could it be a wolf? Soon the Chanterelles are immersed in their first case. Luckily Fenja’s father is a forester and provides the nature detectives with advice.