The time and space background is set in 2509. Earth has not only lost contact with the USG Ishimura and Isaac Clarke, but also with the USB O'Bannon that was sent to rescue them. Four crew members on the O'Bannon survived, but no one knows the whereabouts of the other members, no one knows what happened to them, and no one knows what secrets they are hiding. All of this will be revealed through "Aftermath"