A serial murder case that targets only women with long black hair. Victims have their personal information stolen from their dropped smartphones, and not only their families and lovers but also their lives. Serial killer Urano, who is also a genius hacker who can manipulate people's minds, was once caught by detective Kagaya, who was pursuing the case, but he planned a cyber attack from inside the prison. He took advantage of the confusion within the police force and disappeared. As peaceful days continue, a large-scale cyber-terrorist attack is suddenly launched against the Japanese government again. The source is in Seoul, South Korea. Is this Urano's work? What is the true identity of the mysterious black-haired beauty Soo Min?