Following his uncle's mysterious death, Alex Rider begins a quest for answers that leads him into a dark world of secrets and espionage. He comes to realise that his uncle wasn't the man he thought he was – and that Alex himself is expected to follow in his footsteps.

Still reeling from the revelation that his uncle was a spy for the British Government, Alex is kidnapped and interrogated by an unknown group of paramilitary agents. It will take all his hidden skills to turn the tables on his captors.

Alex is thrown into the unfamiliar world of the ultra-rich as he struggles to perfect his cover identity, but risks alienating his best friend Tom by keeping the mission a secret.

As his covert investigation of Point Blanc gets underway, Alex discovers that he's been left vulnerable. The Department seem to be closing in on the double-agent in their ranks – but the killer Yassen gets there first.

Appalled to realise that the students in Point Blanc are being mysteriously changed by Doctor Greif, Alex enlists Kyra and James in a plan to escape. Blunt spearheads an investigation into Parker Roscoe.

As Tom lands in the crosshairs of the conspiracy behind Ian Rider's murder, Alex and Kyra find evidence of Dr. Greif's secret plan.

Alex leads a Special Forces squad back inside Point Blanc in a stealth mission to rescue his friends and stop Greif's plans.

The Department finally solve the mystery of Ian's death and realise that an old, lethal enemy has resurfaced – while Alex faces off against his own duplicate in a desperate battle to save the people he loves.