In the black vacuum of space, mysteries are born. Spaceship Copernicus and its crew: Declan Tulropper, Elissa, Commander Reliant, Shantos, Simon, Belinda orbit Jupiter and her moons. Second-in-command Declan awakens from cryo sleep into a strange and murderous puzzle. Not only is the commander missing, but one by one the crew vanishes. Is there a killer on board or something alien?