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.

《太阳召唤》讲述世界被一个永久的黑暗屏障分成两半，而幕后的世界潜伏着各种怪物，但此时一位年轻士兵发现自己有着可以解除黑暗屏障的能力；不过当主角正在磨炼自己的能力时，黑暗势力却试图袭击她。