With a youthful face and innocent heart, granddaughter Rio is taken in by her wealthy grandfather, struggling daily to care for him. However, his true intention is to possess her young body. The twisted old man's lust gradually ensnares the pure-hearted girl. As their conflicting desires collide, she is pulled deeper into a whirlpool of obsession. Her grandfather's demands grow increasingly intense, and though Rio trembles under the pressure, she fights to preserve her innocence. Here unfolds a twisted tale of love and desire born from a bond not tied by blood.