After the Russian invasion of Ukraine, when 50 drones took out Russian tanks, costing millions, the Russians and the Chinese adapted these drones using AI to hunt in packs and overrun countries' IT systems. The UK has created a code that runs an anti-drone defence system called UMBRELLA. This world-beating electronic shield can protect tanks and buildings from swarm drones that hunt in packs. Both the Russians and the Chinese want the UMBRELLA CODE and have sent spies and agents to find it. The Prime Minister has tasked ex-soldier Danny Fleet, known to all as Fleet, and Major James Campbell from MI5 with stopping them. It's full of twists and turns, from Kent, the South West, GCHQ, and London's very seat of power.
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