In the follow up to the bestselling Janitors series, a former student is now a teacher and founder of the School of Garbage who is training a new generation of young garbologists to trash talk and fight evil.

Garbage comes to life as animated creatures called junklets, wreaking havoc in elementary schools. Specially trained kids from the magical School of Garbage are sent to stop the rise of the trash monsters. With the school's magical janitorial supplies—brooms that can fly, toilet plungers that can reverse gravity, and mops that can capture anything in their strings—the ordinary becomes extraordinary.

Landon Murphy discovers the undercover janitorial world when his soon-to-be stepsister, Jade Shu, guides him through a magical portal at the bottom of a dumpster that leads to a fantastical landfill and the home of the School of Garbage, where she has secretly been a student for the last few years.

Problems at home with his family make it hard for Landon to feel like he belongs anywhere, but he is quickly welcomed by a student at the intriguing school for wizard-like janitors. His class on the science of garbology is like being a crime scene investigator, and every student gets to bond with one of three Servites—small, magical animals who exhale enchanted dust to help kids focus or be creative or have energy.

Landon and Jade—along with allies from the original series—are tasked to take out the trash and figure out who—or what—is behind the mysterious garbage attacks and stop them before the entire world is literally trashed.