Forsaken, forgotten and stranded in the Mirror Universe, Captain Samantha Hyland is captured and subjected to the powerful mutagen which will inevitably rob her of her individuality and assimilate her into the Hive Collective; whilst her evil MU counterpart escapes the Terran Empire and assumes her place in the Prime Universe and position in Starfleet.

As Sam gradually succumbs to the pervasive mutagen and her humanity slips away, her thoughts begin to merge with those other unfortunates undergoing the change against thier will….