A rival GCHQ team have unearthed important information about Eternal Blue, the cyber weapon which the Russians have got their hands on. But to Jerry's frustration, they won't share the intel, which he needs to thwart the attack and more importantly further his own career and secure his path back to the NSA. So when he finds out that Joseph has a date with Charlotte, a colleague from the rival team at GCHQ Bude, he seizes the opportunity.