Ordinary trash becomes extraordinary at the magical school of garbage—a summer school for young garbologists. Garbage has come to life as animated creatures called junklets and are wreaking havoc in elementary schools. Only the specially trained kids from the magical School of Garbage can 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 as 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.

Three young garbologists must defend the world from new magical trash creations. Landon Murphy never imagined he would spend his summer battling the animated trash monster known as the Megalajunk, and he is eager to continue studying from the wizard-like janitors at the School of Garbage. He’ll need to improve his skills with magical pushbrooms and plungers now that the Thingamajunks have gone rogue. When two Thingamajunks show up at Landon’s mother’s wedding, Landon is desperate to save his family. Using the lock he kept after defeating the Megalajunk, Landon accidentally triggers his own temporary transformation into the trash leviathan. Now, he and his stepsister, Jade Shu, must team up again with Sabra, Dr. Bernard Weizmann, and Daisy Gates to figure out why the Thingamajunks are popping up to ruin parties, weddings, concerts, and other celebrations. Landon suspects the Locksmith is behind the attacks, but information about the mysterious figure is scarce. The questions continue to pile up, but one thing is certain: War is coming to the landfill, and Landon, Jade, and Sabra will need all their courage, creativity, and focus to lay a trap for the Thingamajunks—before it’s too late.