Shika Eris is a young Sugor, the last of her kind, a hunter from the hidden village of Midir. After the disappearance of her people, she travels through the kingdom and frees the Shugo - magical animals whose obedience and devotion are worth mountains of gold in the market. Although the law states that hunting and trading with heavenly messengers is prohibited, this does not stop everyone. And then one day Eris meets the true horseman - Ren Kithar, a warrior of the northern lands. The young man wins her trust and learns Shugo's terrible secret, which completely changes his life. Ren will no longer be the same and will not allow himself to leave everything as it is.