After the Syndicate"s betrayal, Hei finds himself on the run, and fate carries him to Vladivostok, where the interests of the FSB, CIA, and MI6 intersect. The focus of universal attention is Professor Pavlichenko and his son, contractor Shion, who has a twin sister named Suo. While conducting research on the nature of contractors, Pavlichenko attracted the attention of many intelligence services, and a moment arrives when several organizations simultaneously decide to capture both him and his son. However, everything goes off plan: contractors from different agencies clash with each other, and not expecting that anyone else besides them is interested in the professor, they begin to fight; Pavlichenko dies, and Shion disappears without a trace. Suo ends up in Hei"s hands, who has mistaken her for Shion, whom he is hunting on a CIA contract. For some reason Hei does not abandon the girl, realizing his mistake, and saves her from the FSB, soon becoming a witness to Suo"s transformation into a contractor. But she is an odd contractor; she retains emotions and does not lose attachment to people. Hei begins to train Suo in the life of a contractor.