After his inattention causes a mid-flight collision with Polly, Lloyd must attend a 'flight awareness' course run by Molly - if he refuses, he risks being grounded and will therefore have to walk everywhere!

Having written a book on the subject, Gena agrees to train Lloyd in how to survive outdoors, but Lloyd is disappointed to discover that all the training is to take place indoors.

When Abacus is targeted by The Louse Hunter, a ruthless louse spider who loves the thrill of the hunt, Lloyd steps up to the challenge of protecting his best friend. On this occasion, however, Abacus may not need his help...