Vincent Cassini, decorated war hero, but still just a Captain in the police force he started, is patrolling the orbital slums of his home planet Cetus, when he stumbles across a lead in a war crime that resulted in the mysterious disappearance of thousands of Cetans, including his first wife and best friend. Captain Cassini and his robot partner MAC, must ally with morally questionable characters to stop an old enemy before their crimes are erased forever.