A rival GCHQ team find important information about the cyber weapon Eternal Blue, but when they refuse to share it, Jerry must think of a solution, which may rebuild his reputation.
It's a harassment and discrimination training day at CySec but not everything is as it seems with the course leader, Hilary Bowden. Meanwhile Jerry comes to the conclusion that he may have met his match.
After saving the day, Jerry is flying high, hailed as a hero by GCHQ and the NSA and facing opportunities for promotion on both sides of the pond. Meanwhile Joseph is dealing with the harsh reality of no longer being part of the team.