Young orphan Onimaru is adopted by the wealthy Yamabe family and moves into their estate, Wuthering Heights. Soon, the new resident falls for his compassionate foster sister, Kinu. The two share a remarkable bond that seems unbreakable until Kinu, feeling the pressure of social convention, suppresses her feelings and marries Mitsuhiko, a man of means who befits her stature. Onimaru vows to win her back.