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

　　光明马场准备榭寄生舞会之际，一件破碎的装饰品引领佐伊寻找家族秘密，而盖比则发现自己受到了新老板米亚的控制。