Due to an outbreak of Frogs at the school Barrage and Victoria schedule an emergency field trip to the recently reopened Green Apple Splat company for the entire 10th grade. There a melt down is triggered by some of the students, inadvertently locking the students inside the factory. Barrage and Lee are able to work together to not only save the class from the melt-down but also the fearsome cyborg tazelwurms living inside the factory. In a side plot Lee discovers that the Tazelwurm planted a key like device inside his bag which proves vital in the group's survival, and it's discovered that not only did a trio of environmentalists release the frogs at the school and trigger the melt down but they also released them during the Prank, though they aren't connected to the others in the conspiracy.