Byeon Hyeok-jun is a young man deeply in debt who is desperately looking for money. He stumbles upon a mysterious employment agency, the Spyder Human Resource Center, which offers extremely well-paid side jobs. These jobs promise an hourly wage that is as much as 50 times higher than the minimum wage. Although the offer seems too good to be true, Hyeok-jun accepts the mysterious and secret assignments to get out of his financial mess. Soon, his hunt for quick money turns into an absolute nightmare. He ends up at a terrifying, hellish workplace full of supernatural and frightening events.