Stonebridge, Scott and the others sign up for another do-or-die mission after the daughter of Thailand's British ambassador is kidnapped.
Section 20 try to find the real culprits behind the embassy attack, as they attempt to gain information from gangster Ray McQueen.
Locke works out that his long-time friend's widow is working with the dangerous Yakuza and Office 39. Scott needs to protect his son after they find themselves under enemy fire.
Scott has a serious talk with his son while the rest of Section 20 form an uneasy alliance with a couple of CIA mercenaries as they go after Shiro and Mei Foster.
Scott and Stonebridge risk war by entering North Korea, in an attempt to destroy the stolen Vanadium.
Scott and Stonebridge make a major mistake and end up in the clutches of Li-Na. Locke has to decide whether to defy orders to get them out.
The battle with Li-Na is now in Europe, as Section 20 look for a way to get back on her trail. Locke ends up getting an unexpected chance to confront his nemesis.
Section 20 find out that Li-Na is planning a nuclear attack on Europe.