A 15-year-old from LA spends the summer at her mom's childhood home on an island off the coast of England, where she bonds with a mysterious horse.
When her sister Rosie goes missing after arriving at their grandfather's home, Zoe scours the area, meets some locals and has a scary encounter.
When Mia insists on mounting Raven for a photo shoot, Zoe must calm the wild horse so he can be saddled. Rosie snoops in her mom's childhood diary.
To investigate her suspicions, Zoe defies her mom and sneaks off to the stables, where she has her first riding lesson and catches Pin red-handed.
When Pin refuses to tell Zoe why he was stealing from the medical cabinet, she follows him home and finds out. Mia learns Zoe is not allowed to ride.
Mia invites Rosie to a sleepover. Zoe and her friends find an engraved riding crop that may have been left behind by the horse thief.
Zoe learns why her mom forbade her from riding. Jade uncovers a secret about Raven's past. Becky proves to Ben that horses are better than quad bikes.
Zoe learns more about Raven's mysterious origins. After finding what may be the real horse behind the ghost pony legend, Rosie realizes who "E" is.
Mia sabotages Zoe's plans for the barn dance. Becky sets a trap for the ghost pony, but she and her friends catch a suspected horse thief instead!
Ben helps Rosie trick her dad into calling her mom. While leading the kids on an islandwide search on horseback for Raven, Zoe has it out with Mia.
The kids compete at the county show. An odd comment leads Zoe to realize who helped the horse thief, and sends her racing off to rescue Raven in time.
