When her home is destroyed in wildfires, fourteen-year-old Australian outback genius Kayla Connolly decides to hunt down the culprits of climate change: billionaires. She teams up with Mr P, a giant ex-soldier from Tuvalu whose home is being flooded by rising sea levels. Together, they find ingenious ways to kill a property developer building on protected wetlands and a mining company CEO poisoning the earth with toxic chemicals. They also find an unexpected ally in Nancy, a wealthy elderly woman with a shocking past. The trio?s mission soon develops a life of its own, taking them first to California to crack billionaire tech bros and then to London for superrich oil executives, spawning a global movement along the way. In pursuit are the FBI and Detective Sergeant Kate Anderson of Scotland Yard, but Kate is having doubts about whether Kayla is even in the wrong. Will Kayla be able to stay ahead of the game and pull off one final, remarkable hit?