One day there was an enemy in a spaceship. He looks like an ordinary crew member, but he does horrible things – he damages equipment and attacks other people. The player will get a chance to play one of two roles – crewmember or assassin. In the first case, he will look for the enemy and inform other people. In the second, he will kill the crew members and hide the traces of the crime. In addition, he will damage a spaceship. If he gets caught, he loses and the game is over. If he kills everyone, he wins.