A huge fleet with the mark of The Abyss quietly appeared in the Maro Empire.
No one knows where they came from, where they are going, or what they are coming for.
When the Empire finally realized the threat of The Abyss, nearly 13% of the star field had been eroded.
In 3658 of the Maror calendar, the Abyssal Fleet occupied most of the galaxies in the four-linked star field, and the empire was dying, leaving only a heavy and broken body.
In order to increase the confidence of the people, the "Heir Plan" was officially announced. However, even so, the pace of The Abyss still cannot be stopped.
In 3672, Marlowe was ordered to lead the Empire's Third Joint Fleet to attack The Abyss...