In the year 3197 AD, humanity has reached the stars and has terraformed and colonized a small section of the Milky Way. It has been 6 years since the end of the Isolde Revolution, a war that split humanity into two political blocs at the cost of hundreds of millions of lives. The Federation of Human Planets licks its wounds and tries to adapt after a third of its population broke away. The Independent Frontier Systems Alliance, IFSA, desperately rebuilds its devastated worlds with a shaky economy that can't survive another war.

Erina and her sister Ashley were living a simple life when they came across an interesting job opportunity for both of them aboard a ship to work as freighters. The sisters meet the owners of the ship, two cousins and veterans of the Isolde Revolution. The tall cousin, Francis, is the captain and owner of the freight business. A man with charisma and a big smile, he leads the crew of Silver Bow. The other cousin, Charlie, is the taciturn first officer haunted by his past and the betrayal that almost killed him three years before.

While the crew restores Silver Bow to get it flight ready, they learn to work with each other and their various personalities, but they discover that a local mafia boss has other plans, and their safety and lives hang in the balance.