A boy discovers his new stepdad has created advanced robots and he brings them out into the world. Teenager Leo's life tangles when his mother Tasha remarries the billionaire inventor Donald Davenport. When they move in to his house, Leo dashes into his teenage siblings in the basement. They are endowed with bionic powers but lead a normal life in Mission Creek, California. Donald's younger brother Douglas Davenport joins the Lab Rats while Krane's bionic soldiers are trained to be the world's new bionic heroes.