简介：In2050,Earthhasbecomeadryanddesolateplace.FighterpilotNovaisforcedtotravelbackintimetopreventadevastatingenvironmentaldisaster,howeveranunforeseenside-effectoftimetravelmakesNovayoungagainandshecrashlandsinto2025asatwelve-yearold.Nobodyseemstotakeherandhermissionseriously,exceptforNas-aneglectedteenwhotriestokeepthismysteriousgirlandherlittleflyingrobotADDoutofthehandsofthesecretservice.WillNovaandNassucceedinsavingthefutureworld?