33-year-old Debbie Maddox (Martha Howe-Douglas) is becoming increasingly bored with life as a suburban stay-at-home mum. Then one day an elf (voice of Mathew Baynton) appears from a portal in her cupboard insisting that she's the 'Chosen One' destined to save Yonderland, a magical land threatened by the evil Negatus (Simon Farnaby). Reluctantly, Debbie agrees to meet with the Elders of the realm... only to discover that they've lost the scroll that explains what the Chosen One is actually supposed to do. Yonderland, it turns out, is a very silly place indeed, and it will take all Debbie's resources to complete each week's quest in time to pick up the children from school.