Year 2017. Skuns' ship appears in the solar system for the first time. Humanity gives it the name Oumuamua. Two years later, the object disappears in a mysterious anomaly located between Mars and Jupiter. More alien ships arrive soon. Earth research probes sent on their trail discover a passage in this area, leading to the Epsilon Eridani star system ten light years away, inhabited by the Skun race.

Year 2045. The first Earth colony ships enter the Epsilon Eridani system.

Year 2205. Skuns' Dominion is just a memory. The decimated aliens hide in the asteroid belt on the outskirts of the system, from where they launch an attack on the colonists. A giant Skun warship sets off towards the only planet in the system and its moon. The human fleet guarding the planet is dispersed, with only a small strike team consisting of a cruiser and a few escort ships in the system.

Can a single ship stop an overwhelming enemy force? Will humanity be able to save the new domain from extinction? How much are people willing to sacrifice to do this?