Luka Kane has been inside hi-tech prison the Loop for over two years.
A death sentence is hanging over his head but his day-to-day routine is mind-numbingly repetitive, broken only by the books brought to him by the sympathetic warden, Wren.
Then everything starts to change: rumours of war are whispered in the courtyard and the government-issued rain stops falling.
On Luka’s last, desperate day, Wren issues him a terrifying warning: breaking out of the Loop might be Luka’s only chance to save himself – and the world…