Boboiboy and his friends were fighting Adu du and Probe, when Adu du shoot them with his new weapon. Boboiboy thought they were goners, but it manage to send them to a whole new world beneath their feet, Slugterra. What will happen when the Shane Gang meet the Malaysian heroes? (A Boboiboy and Slugterra crossover) *Note Boboiboy and his friends are 14 and Eli is still 15*.