Dr. Taylor Black, a neurologist and neurosurgeon conducting research on restoring brains damaged by physical and mental trauma, arrives on the giant ISS Amazonas, the flagship of the Imperial Fleet. The ship is captained by the famously dashing Edward Wakeman, who ruthlessly wages his own personal war against the Enemy, malignant and invisible entities that threaten a vast sector of the Empire. On Amazonas Black has a chance to further his studies, but at what cost?