The X-434Z prison ship holds some of the most dangerous criminals in the Sonora sector. Recent escapes from prison worlds in the sector have led to authorities placing the worst offenders on a ship that rarely visits port anywhere in the sector. But a small group of rebels have discovered that the ship will be in a certain system at a certain time. They want a political prisoner held aboard the ship to be brought out of the ship alive. They are willing to pay handsomely.