Lily-Rose, Ant, Cat, Jay, Sky and Skipper the dog travel Great Britain in a green hot air balloon finding out about nature, looking out for Green Balloon Club members down below. Ant brings in in his prize model of a stag beetle and the team find out about Britain's biggest insect, sadly under threat. Green Balloon Club members Robert, Alexia and Joshua report on what they are doing to help build homes for stag beetles. Jelly visits Bill Oddie and they go on a bug hunt to see what they can discover in his garden. Lily-Rose is particularly fond of bees, as they help pollinate her flowers, so she and Cat make a bee model. Club members Jasmine and Jimmy set a beetle spot for everyone to look out for where they live.