A young boy is sent to spend a summer with his charismatic and eccentric grandfather on a remote Welsh farm. Expecting dull days and strict rules, the boy instead stumbles into a world of delightful chaos and imagination – where outrageous stories are spun, and a world of wonder, memory, and mischief unfolds.
| Actor | Role |
|---|---|
 Artie Wilkinson-HuntBoy | Boy |
 Anthony HopkinsGrandpa | Grandpa |
 Aimee-Ffion EdwardsMother | Mother |
 Catherine Zeta-JonesMrs. Edwinsford | Mrs. Edwinsford |
 Aneurin BarnardThe Hunter | The Hunter |
 Geraldine JamesNot listed | Not listed |
 Celyn JonesMr. Griff | Mr. Griff |
 Oliver RyanMr. Evans | Mr. Evans |
 Mirabel StuartMrs. Lewis | Mrs. Lewis |
| OOphelia MilesThe Girl | The Girl |
| TTeifi JamesRider #1 | Rider #1 |
 Dylan JonesRider #2 | Rider #2 |