Little lady

A girl named Larissa finds out about her to dopple ganger that escaped the old science under her school. This dopple ganger was less intelligent and knew little to nothing about the outside world because it's been stuck with its creators dead body under ground. But what everybody doesn't know about these dopple gangers is that everyone has one. Larissa is a smart girl and realizes this. She also realizes that her dopple ganger has more than just her looks they have the same mind set and larissa has to try and outsmart herself. How will she catch her dopple ganger while also try and stop everyone and anyone from interfering with her plan.