After bringing up the legend of a former PCA student named Charles Galloway, who fled to the wilderness above PCA at a place called Redstone Gulch because of an extremely hard test, the gang decides to go check it out for themselves, with help from Lola's crush, Leif, who then gets himself and Lola lost in the wilderness. There, they find the necklace of Charles L. Galloway. When the gang refuses to let Logan keep the necklace, which he says will be evidence that they proved the legend true, and make them famous at PCA, he steals it and puts it in Zoey's backpack, causing a violent thunderstorm to form a green cloud to come after Zoey and the others, which causes Zoey to break her ankle. Zoey must help save PCA by getting to Redstone Gulch and placing the necklace back where it came from.