The Heart Eater's Vow For centuries,the foxes have lived among humans, hiding an ancient secret that could destroy everything they have built.Seo Ji-hwan,the last fox king, carries a curse known as the Heart Vow a mysterious fate tied to his heart and life force.Long ago, the woman destined to him, Mi-rae, sacrificed herself to break the curse but the vow was never truly broken. As Michelle begins experiencing strange memories and discovering secrets that were never meant to be uncovered,she realizes that her connection to Ji-hwan may be far deeper than either of them understands. But Ji-hwan isn't the only one hiding secrets, Seo-Mujin the fox king rival and brother figure, has his own reasons for watching Michelle.Behind him stands Hw-ryeon ,a woman connected to the darkest chapter of the fox king history.The closer Michelle gets to the truth, the more dangerous the past becomes, because the Heart Vow is waiting to be fulfilled again and this time Michelle refuses to become another sacrifice. some vows are meant to be broken. Some secrets are meant to stay buried.but some hearts remember what the world has forgotten.