"All those disaster movies you've watched, all the YouTube videos you've seen with people frying eggs on the pavement, seeing ice cubes melt in minutes, that's nothing. You've no idea." London, 2022. The heat is rising and things are reaching boiling point. As the world struggles in an endless heatwave, nineteen-year-old Luke Spargo believes he's the only one who understands what's really happening to the sun - and if he's right, he's the only one who can stop it. But Luke's childhood demons are closing in. With the arrival of vibrant, turbulent Fee, the precarious balance of Luke's life shifts irrevocably. As his secrets become harder to control, Luke must confront the terrible price of protecting them.