After her first trip to space, Mikayla Dearman is obsessed with the idea of returning there again, an obsession that takes her wandering in the woods at night. Newly returned from the Universe Protection Agency Academy aboard the Hero, Kevin and his sister Jenna find out that Mikayla has been wandering near a giant footprint. When Mikayla goes missing, Jenna and Kevin both set out to look for her... Jenna with her new best friend Bianca on Rexette...