Batiya is the only female engineer on her world's first deisel-powered ocean liner. Chunru is a shipwrecked foreigner she helped pull out of the ocean. Unfortunately, his ship sinking was no accident: someone's trying to kill him. And because of Batiya tries help him, she nearly gets killed herself. But although Chunru didn't have a lot to say about who he was or why he's got assassins after him, he was willing to trade his life for hers, so Batiya is determined to deliver him safely to his destination.
This is an adventure/romance story set in a world that is very similar to ours, only with different geography and history. The technology is roughly equivalent to the 1920s, and there is no magic.