All Donnchadh needs to do is hack some files. Easy. Upon delivery of the Bride, he can stop looking over his shoulder. Nobody will come to break his legs or murder his younger sister Saoirse. Nobody needs to know the details of how he earned the money. He's the best hacker in the galaxy, so he can hide his tracks, which is why the warlord wants him. This job is his ticket to Easy Street.
But Princess Celeste doesn't make the delivery easy. She's feisty and cunning, and she has no desire to marry a strange warlord. The job gets harder as it goes on; he'll have to ignore his heart's response to her to collect his payment.