Pilbeam, the Mennyms' eternal teenager, is in a rebellious mood. Staying inside all the time is driving her crazy and she's fed up with leading the sheltered life vital for the survival of the Mennyms. One fateful night, Pilbeam throws caution to the wind and goes out to the theatre - and in doing so threatens her own safety and the very existence of her whole, rag doll family. . .