When Norman Graysmith is invited into the home of an aspiring serial killer, Aidan Mendle, he believes he has the subject for the documentary that will make his career.

Amid a bug-infested heatwave driven by climate breakdown, a troubled conspiracy-obsessed teen on the run is taken in by a reclusive farmer. But when her manipulative stepbrother arrives, it's not only the mosquitos she will have to survive.