Ryan is the son of the Prime Minister of the Blue Moon Empire and comes from a distinguished background. However, due to his unfavored status, he was often abused by his half-brother. He escaped from his brother's birthday party, but was captured by human traffickers and became an auction item for the underground trading place. By chance, Ryan was bought by Austin, the Supreme Commander of the Star Ocean Alliance. In a foreign country, he meets his mother's half-blood servant and gradually unravels the mystery of his birth. With the development of the story, a century of silence of the blood race also re-emerged, opening a new round of war between the orcs and the blood clan.