Gabby Gomez (a.k.a Gum Girl) and her family visit Mexico where they meet the famous luchador Sol Azteca, who takes them to his wrestling training camp inside an ancient Mayan pyramid. There Gabby (a.k.a Chica Chicle) uncovers hidden connections within herself and her Mexican heritage. She also discovers the chicozapote tree that the Mayans and Aztecs used for GUM! When the infamous luchador the Underhander threatens to steal a sacred artifact, Gabby and Rico quickly slam into trouble. Will Chica Chicle be able to bounce her way to safety—or will she be stuck for good?