Soo-hyun, who has recently moved into a new house, buys a used washing machine through a second-hand app but finds out it doesn't work. Annoyed by the seller's irresponsibility, she leaves a comment calling the seller a con man, and reports it to the police. Little does she know that the seller is a psychopathic serial killer who uses an online second-hand market to lure his victims. Her comment renders his hunt for a new victim all but impossible so she becomes his next target. She starts receiving obscene phone calls, countless unwanted food deliveries, and strange men knocking on her door looking for a good time. A trip to the sender's address proves deadly serious when the police and Soo-hyun find a man’s dead body.
as Jang Soo-hyun
as Joo Cheol-ho
as Na Seung-hyun
as Oh Dal-ja
as Chief Im
as Kim Hye-jin
as Delivery Man
as Detective Lee
as Detective Kim
as Student
as Student
as Worker
as Worker
as Worker
as Invitation Man
as Forensic Team
as Employee
as Police
as YouTube Man
as Soo-hyun's Landlord
as Repairman
