Hei, Yin, and Mao are targeted by a group of contractors and now must fight to survive. Things become problematic when Yin goes missing. Now Hei and Moa must find her before the enemy does, but things change when Yin's old piano teacher gets Gai and Kiko to find Yin for him. The race is on to find Yin, but who will get to her first?

The Organization orders Huang to kill Shihoko, and as a secondary directive secretly orders Mao and Hei to kill them and Alma if Huang fails. In Huang's past we see him falling for Shihoko, and then Shihoko killing his then police partner Isozaki. Isozaki's wife's memory is wiped by the ME, and Huang is drafted into the Syndicate. He is unable to kill Shihoko, and asks Hei to kill them both. Hei tries to help them run away while Mao refuses to have any involvement. When they arrive at the docks to wait for a boat, Shihoko sees someone from the Syndicate and realizes they cannot escape. For love of Huang she runs into the path of an oncoming truck and dies.

Aboard a speeding train, Hei's team is ambushed by Russian authorities. In the ensuing battle, Suo and Tanya recall the times they shared in the past as friends - and clash violently in the present as Contractors.