On a rainy night, Lin Xiaohui, a jewelry store clerk, senses she's being followed. She rushes home, locks the door, and calls her husband—who dismisses her fears as paranoia. Shrugging it off, she washes up and goes to bed... unaware someone is already under it. The intruder quietly uses her bathroom, then sleeps beside her. The next morning, neighbor Xu Jiao complains about loud late-night noises—but Xiaohui swears she was asleep by 11 PM. At work, a scar-faced drifter named Man Cang suddenly appears, startling her. When he tries to buy a necklace, manager Zhang Dabao humiliates him, calling him a "beggar" who scares off customers. That night, Dabao's car is mysteriously wrecked in a hit-and-run. And now, Xiaohui has a new problem: neighbor Liu Qiang won’t stop following her...
