After a man accidentally leaves his smartphone in a taxi, he and his girlfriend are plagued by stalkers and cybercrimes.

A couple of months have passed since the serial murder case. A new dead body is found in the same area. Detective Manabu Kagaya tries to find the truth. He goes to see serial killer Yoshiharu Urano in prison.

In the previous film, the genius hacker and murderer Urano successfully escaped from prison. Now, he has come to Korea at the request of the anti-government group "Mugunghwa," which aims to prevent an upcoming Japan-Korea summit. Soo Min, a member of Mugunghwa, is assigned to monitor Urano but gradually feels a sense of kinship and attraction towards him. Meanwhile, Detective Kagaya, who previously captured Urano, faces him again in his new role within the Japanese cabinet.