A woman living alone starts to feel uneasy when she discovers traces of a stranger having been in her home. Single and beautiful Fang Hui works alone in the big city. One night, she suddenly hears someone outside the door trying to break in, violently pulling the door. A security guard notices that the floors monitor are broken. This made Fang Hui's peaceful life of living alone suddenly shrouded in the shadow of anxiety. When the night came again, sleeping Fang Hui vaguely notices that someone had entered her room... but she didn't find any signs when she wakes up.
Zhang Yao, whose family was destroyed by drug dealers, secretly cooperates with Anti-drug team leader An Du. The two join forces to ruthlessly eliminate the evil and vow to wipe out Mukun and Anpei, the top two figures of the criminal group.
