After inadvertently accessing a high tech wall panel that sends him plummeting into a secret underground lab, Leo discovers three teen super-humans - Adam the strong one, Bree the fast one and Chase the smart one. The three, eager to leave their confines, convince Leo to take them along to school, where they try to be normal teens while managing their bionic strengths. Along the way, they help Leo build confidence in himself, and figure out a way to keep their bionic abilities and dangerous missions a secret from the world.