From the back of the book:
Captured by the Imperials, a small group of Rebel heroes find themselves trapped within the detention block of a Victory-Class Star Destroyer, but an attack has left the Star Destroyer a battered wreck, its crew scattered and power fading. What dangers await within the smoldering ruins of this once great vessel?
Only those with courage and conviction will attempt to find out. Only those with strength and luck can hope to survive.