因妈妈与发明家继父结婚,里欧搬进了由高科技电脑控制的新家。后来他在地下实验室发现了三个继父所发明、外表宛如真人的超级机器人!由于三个机器人也想成为新家的一分子,让里欧一下子多了三个手足,家里也因这三个超级机器人而引发许多新鲜事…When 14-year-old Leo's mom Tasha Dooley marries billionaire inventor Donald Davenport, he moves up in the world, but neither he nor his mom in their wildest dreams imagine that Leo will soon find three bionic super-powered teenagers - Adam, Bree and Chase - living within a secret lab beneath the inventor's expansive home. Now Leo has three older "siblings" to watch out for him while he introduces them to the outside world. School life and super-adventures await them all.