Riona is at her family home preparing for her father's third-year memorial service. With her mother out working, she is left alone to watch the house when her uncle Takashi suddenly shows up. Takashi, who previously served time for robbery due to his abnormal sexual tendencies, has just been released from prison. Though Riona remains wary of him, he ignores her caution, enters the house uninvited, and makes his way into her bedroom. At that moment, his eyes lock onto Riona's figure, and a new, twisted relationship begins.