When you're a privateer, running a starship is a family business. And for Tycho Hashoone, his twin sister, Yana, and their older brother, Carlo, the family business is far from easy. For starters, they have to make a living however they can, all while dodging pirates and Earth's dreaded warships. They have to please the Jovian Union, an alliance of moons that provides the Hashoones their letter of marque against Earth's merchant fleet. But hardest of all, the siblings have to impress their mother, Captain Diocletia Hashoone, who keeps a log of how they perform on every test, simulation, and mission aboard their family starship, the Shadow Comet. Because while the three siblings might be crewers together, only one of them will be chosen as the Comet's next captain. Talk about sibling rivalry!