The Squirrels are playing outside. Roly is digging in the garden when his spade suddenly hits something. It's a key. But what does it do? Duggee has his key badge and says they can find out through trial and error. The Squirrels go on an adventure to work out what the key opens and what could be inside.

It's a lovely day outside and Duggee is watering the plants while the Squirrels play nearby. Happy goes to retrieve a ball and finds Mole sitting on a bench looking very sad. Mole is reflecting on missed opportunities and forgotten dreams. As a young mole he wanted to be... a stunt mole! But he couldn't follow that dream as it was too hard with his vision being so fuzzy. Can Duggee and the Squirrels help?