'My girlfriend is on a live stream with hidden cameras on the internet?!' Freelance producer Dong-ju, who is struggling to get a job in a big company and in danger of being dumped by his girlfriend Su-jin after getting caught receiving a link of an illegal live stream with hidden cameras from his friend. While he is preparing for Su-jin’s surprise birthday party, a mysterious live stream link is sent to his phone that opens automatically... 'The customer with ID 486 has entered.' A live stream with hidden cameras has begun in real time! But there’s his girlfriend Su-jin on the monitor and Dong-ju is shocked. An unidentified person named ‘Gentleman’ and Su-jin falling into a faint. To save his love Su-jin, Dong-ju starts to participate in the live stream. But ‘Gentleman’ is leading the live stream to the worst-case scenario...