It’s 2555—twenty years before the First Swarm War. A ship full of Fleet Academy trainees is on maneuvers in the Asteroid Belt of the Sol System. They find a Russian scout ship, Tarantula, crash landed on the dwarf-planet Ceres. Investigating the wreck turns a training cruise into a deadly fight to stay alive. And surviving depends on two fourth-year midshipmen, Addison Halsey and Samantha Avery, commanding the mission.