The story unfolds the day before Thomas's birthday with the crazy antics of the guardian fairies. We go from a simple toothache to multiple visits to the Accident & Emergency department of the hospital. Then to the party the following day, a food fight and strange games with the inevitable happening, more visits to A&E. Boys will love it and girls will smile at the antics of silly boys! Now the truth is out, the myth that Christmas tree fairies are tucked away in tinsel each year is blown out of the water. Yes, you think they are nestling in a bed of tinsel in a box in the loft but no, Christmas on the tree is their holiday and their real day jobs are as guardian fairies for little boys and girls. Most are able but unfortunately not all, some are not as competent as they should be, and some are downright incompetent! In Thomas's Tooth we have a birthday party of injured and plaster-casted boys running amok, and all due to the exceptionally incompetent actions of Thomas's fairy Erik and his fellow fairies.