When war breaks out between the human civilisations and most Legion officers return home, only a handful are left behind to protect the Drift. With a fleet of deadly aliens set to invade in a matter of days, Elias must hunt down the only man with access codes for a vital arms cache. Unfortunately he has company. Elias and his crew are forced to share a ship with Sienna and her friends. A con-artist and a thief, Sienna is on the run from bounty hunters. He wants to save the Drift. She has other plans.