Silu Su is just a soft girl who naively marries a foreign country due to her father's arrangement and is willing to become a victim of power exchange. However, fate plays tricks on her, and what awaits her is endless imprisonment in a deep house compound and the mystery of her life experience. Who is she, why her husband and her are always in name only, and why the young master who is clearly in love has traveled to another country because of her? Perhaps only when the flowers fade and the leaves fall can these mysteries be solved one by one.