Aboard the spaceship Eurus, things are optimal. Oxygen supplies are at 80%, crops are thriving, and the twelve-year journey through the Messier 42 nebula is going smoothly. Everything is set for a successful pilgrimage to continue the survival of the human race.

Only, when a series of murders occur onboard - mirroring distressing radio signals from Eurus’ sister ship, Notus, Officer Alecto McAlpine finds herself lost in the middle of a conspiracy. With the begrudging help of low-level communications coordinator Cairo, they begin to find that the ship’s journey is the least of their concerns.