After losing her laundry store to a fire incident, a single mom Duk-hee receives a call from a bank offering a generous upfront loan so she takes it right away. But soon after, she finds out that she has become a victim of a voice phishing scheme. Devastated, Duk-hee turns to the police for help, only to be more disappointed that there is no hope of retrieving her money. At the moment of despair, Jae-min, the phisher who tricked her, rings her phone once again to tip Duk-hee off about the criminal organization that locked him up and coerced him to make voice phishing calls from China. With that call, Duk-hee makes up her mind to investigate this case for herself and take a plane to China with her friends.

Dragon Inn takes a case of a missing girl. She had no reason to run away from home, which makes the situation quite suspicious. While investigating her case, they find out that a pseudo religion is implicated. Trying to find more information of the girl, Seung-jin makes a mistake and their location and identities are exposed. Will they be able to defeat the cult and save the girl from them?