This is book 3 of the "Rookie Privateer" series.

This note contains spoilers for the book.

The crew gets contracted to transport a spy to XXXX. They also arrange some cargo for cover, and hang out on Mars while the ship is fixed up by the Navy. Harry Flark, who robably spearheaded the pirate attack on Liam and Nick's home, is now running this new place; the attack is expected momentarily.

While on Mars they run into Natalia from the last book, and her crew, in the training simulator, and become friends. Natalia recognizes Liam's name and thinks he and Nick and Tabby did well in the original pirate raid. And ends up working for them.

Liam also gets to spend time with Tabby. That relationship is in a very strange place—since Tabby seems to be naturally monogamous, but even more "save it for marriage". Nobody else in that universe thinks like that, and there's no hint of religion or any of the usual Earthside reasons for somebody to feel like that, so it's a weird wart on the side of the worldbuilding that's never explained. Even a "No idea why she's like that, don't know anybody else like that, don't know why she can't explain it, but it's important to her and I love her so I'll deal" would have helped; as it is it feels like attitudes from this world intruding on that one without examination.

But back to the action, they reach their destination, use advanced tools, poke around, make rookie mistakes that contribute to getting into a fight, win the fight and ensuing ship actions, and go back to rescue the spy. In the end, they win!!!!!