After befriending a mysterious horse during a summer in the English countryside, 15-year-old Zoe feels the strength to deal with issues she faces.

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.

With raven gone, and the horse thief unknown, Zoe must try to find answers. However, the competition must go on, and with the horse competition today, Zoe continues her story and uncovers secrets she never saw coming. Her and Marcus also continue their friendship, resulting in a lovely surprise at the end.