Waiting for her boyfriend at his apartment where he lives alone, she receives a call from him saying, "I'll be home late tonight." With no choice, she decides to take a shower to pass the time. Just after finishing her shower and changing clothes, the door suddenly creaks open. Standing there is an unfamiliar middle-aged man. She instinctively shouts, "Who are you!?" but the man is equally shocked. He turns out to be her boyfriend's father, who had come to visit his son. Seeing her half-dressed, he becomes instantly captivated by her beautiful body. His reason crumbles at the sight, forgetting she is his son's girlfriend, and he immediately lunges at her. An unexpected encounter sparks a thrilling, heart-pounding turn of events.