Girl Guardians of the Earth

Samantha, a young scientist, is one of the survivors after the earth has experienced an apocalyptic catastrophe. She did not abandon her homeland with others, but stayed on the earth and worked hard to find a way for humans to survive. As the last spaceship heads for a distant human space colony, her determination to stay is shaken by the arrival of another survivor, Micah. She must decide whether to set out with Micah to start a new life in a human refuge, or to stay and defend the Earth.