Scott and Mike continue to look for the ones responsible for the embassy bombing. The ambassador recovers in hospital with Chloe and his wife beside him. Mike still recovering from the sore shoulder takes on desk command while Scott and Philip go out to get Ray McQueen back from the corrupt police. Ray will only talk with his wife safe.
Scott provides some parental advice to his son, while the rest of Section 20 attempt to locate Mei Foster. At the same time, Section 20 accepts an uneasy alliance with a pair of CIA mercenaries who are only interested in Shiro. The team attempts to stop Mei, while Scott races towards the action on a stolen motorcycle.
Scott and Stonebridge sneak into North Korea to destroy a factory where the vanadium is being processed. Finn is kidnapped. After destroying the factory Scott and Stonebridge surrender because Mei threatens to kill Finn.
The team head for Vienna following the lead on Li-Na & Kwon. From Nina's agent they get details of a meeting between Kwon and someone from Locke's past. They observe the meeting but things do not go according to plan.
Scott and Stonebridge chase Li-Na and Kwon and attempt to rescue Pirogova. Locke encounters "Oppenheimer" again and must decide his fate. Scott and Stonebridge discover Li-Na and Kwon's intended target with codes.
The Section 20 team is showing no signs of fatigue after their cross-global mission to track down slippery North Korean terrorist, Li-Na. Always one step ahead of his British bosses, instinct-driven Lt. Colonel Locke takes his team rogue once more as they defy Whitehall and travel to Geneva where he is convinced Li-Na and Kwon are preparing to attack the United Nations HQ.