Maya and Willy's favourite tree, the oak, is sick! They need to plant a truffle under it. But they discover that Polly the mole-cricket is eating everything under the tree! How are they going to save the oak.
A new little bee, Hannah, pretends she is not a real bee and that she can't find resin buds to make propolis. Maya wants to prove the contrary. Hannah ends up provoking a disaster making a big hole in the hive.