Yona, the innocent princess of Kouka, is adored by all who encounter her. Having been sheltered in the royal palace her entire life, she's been protected from any harm. But nothing good lasts forever. When a vile act of treason threatens to take away everything she holds dear, including her right as Kouka's princess, Yona's perfect world shatters. She has no one left to trust except her loyal childhood friend and bodyguard, Son Hak, and must escape the palace. Yona discovers that her kingdom is no longer a safe place, and survival in the wilderness with a target on her back is challenging. Having lost her innocence, Yona makes a pledge to become powerful enough to conquer her foes. With Hak at her side, she must decipher an ancient legend to take back her kingdom from those who conspired to take it from her.