Wednesdays had become the worst for Rhodri, full of school tests and always a let-down, but his chance meeting with Idris, a member of the legendary King Arthur's Court, looks to change all this.As the next Wednesday rolls around, combining their friendship, bravery, and a little bit of luck, Rhodri, Idris and Dylan, Rhodri's dog, set out to achieve their goals in this story of patience and perseverance - Rhodri will make it to top of his class, Dylan, the former sheepdog, will find a new purpose, and Idris will take his place among King Arthur's knights.