Caine takes her to claim her rightful titles and authority, helping her through the process and speeding things up. She learns that one of their enemies has abducted her family, and fights to save them, Earth, and essentially several other planets. She proves herself in combat, and is rescued a few more times by Caine and his friends, before finally returning to Earth.
While her family has no recollection of the time they spent in captivity on another planet, Jupiter retains all of her memories of the events. Caine regains the wings he's lost long ago. Jupiter makes it clear that she is interested in him, and even given their different political statuses, they end up together.