Best friends and upper classmen at Misty Springs High, Camille and Alec discover the underground metropolis of L.I.M. City whose artificial sun is fueled by a clover derived life serum. Having befriended the inhabitants the pair agree to assist in the preservation of the city. Recruited as upside agents and aided by seemingly non-magical gadgets and a supernatural experience in the codes the two endeavor to protect the serum from an adversarial group. Folklore of the South of Old L.I.M. City tells of an elusive, infinite life serum no Limerick has yet been able to possess despite endless searching. Determined to have the infinite serum the two embark on a mission and find themselves taking flight in a landair, submerged in a bubble craft, and held captive in a sub-aquatic structure. Pursuing the adversary who manages to confiscate the serum Alec visits the codes a second time pleading help in avenging L.I.M. City of its loss and this message is shown him: Find your way below, down under where floods once raced and humans paced. Follow the path from the old to the new; there you'll find the traitorous few.