Kidnapped

A female soldier is almost killed by an IED. She is on deaths door, but finally begins a partial recovery, and comes to grips with her injuries. When she is kidnapped from the hospital, she is thrust into a situation that is out of this world.
The kidnapper, not aware of her physical condition, gives her an ultimatum. Failure to comply with the ultimatum would result in another situation she considers worse than slavery.
When she finally gets him to realize her physical condition, he offers her medical treatment that is out of this world.
Back on her feet, she must still comply with his original ultimatum, chaperon a princess. She knows the rules from her planets technology. Aboard an alien spacecraft, she can only guess at its rules.
Her limited success in one area, puts her against a clan in a blood feud.
That only starts her trek across the stars where death is just a breath away.