Forced to flee for their lives after an explosive confrontation with a depraved killer, Catrin and Simon have arrived in the sprawling city of Londunium pretending to be a newly married couple, though they don't expected to keep up the ruse for long. An ocean away from her home in Collis and the horrors she witnessed there, Cat looks forward to honing her healing moon-driven magick at the local Selenae university, but instead finds a council of ruthless leaders threatening to erase her outsider "husband's" memories to protect their secrets.