Assassinaut

Assassinaut is a science-fiction adventure film about a young girl who braves the alien wilderness of a faraway planet to save the President of Earth from a murderous astronaut.
In the near future, aliens have invaded Earth and declared a galactic war resulting in thousands of human casualties. To save Earth, a team of four teenage astronauts brave the alien wilderness of a distant planet to stop an assassin from changing the course of history forever.