On a dark and rainy autumn night, a mysterious intruder sneaks into the luxurious mansion of a prominent high-society family. The family, who has just celebrated an opulent party, finds themselves disoriented and terrified when they realize that one of their guests has vanished suddenly. Rumors about a ruthless thief lurking in the city fuel their fear, but what no one knows is that the true intruder is not seeking money, but revenge.
As the night progresses, well-guarded secrets come to light, revealing the betrayal and hypocrisy hidden behind the perfect facade of the guests. The tension in the mansion escalates as family members begin to suspect one another, and old grudges resurface amidst whispers. With an atmosphere of claustrophobia and paranoia, each character becomes a potential target for the intruder's assault.
In a shocking twist, the intruder reveals their true identity and the motive behind their stalking, transforming what seemed like a simple theft into a psychological game that tests the loyalty and morals of everyone present. By the end of the night, no one will emerge unscathed, and what appeared to be just a social gathering turns into an existential conflict that will forever change the lives of those in the mansion.