On Stix's first day of sixth grade, his anxiety is off the charts. It doesn't help when he spots a kid who reminds him of his old bully, Xander Mack. Soon after, he encounters two other students who take a keen interest in him. He quickly learns the spooky truth—the trio are lost souls in need of a solid. When the ghosts tell him they've been stuck in middle school for decades, it's up to Stix to figure out how to help these not-so-normal new friends.