sentences:  Harper and Elliot, two 23rd-century investigative journalists, have joined an organisation called the Alterian Corps in order to further their careers.They have been sent on a mission to the planet Rigel V which is in a state of war with one region holding out against the Federation troops attempting to conquer it.The Rigellians claim to possess a Doomsday Machine which will enact a terrible revenge if the Federation refuse to withdraw from the planet.