S1, E4: Sally, Rotor, Bunnie and Antoine take off in a homemade airplane, bound for an ancient city hidden deep in the Great Mountains, while Sonic follows via his favorite transportation, his sneakers. Their quest is the "secret scrolls" that have great powers they hope to use in their struggle with Robotnik. To get the scrolls, the Freedom Fighters are confronted by a maze of booby traps and puzzles that test their intellect, strength and courage. Things go from bad to worse when Robotnik shows up with a Swab-Bot team and demands the scrolls.