In a world shrouded in secrecy and danger, Yoohyeon finds herself torn between loyalty and the pursuit of truth. As a skilled Assassin, she embarks on a treacherous journey with her allies to uncover the mysteries hidden within the enigmatic Precursor sites. But when shocking revelations fracture their bonds, Yoohyeon must confront her own beliefs and make choices that could reshape the destiny of her own life.