River awakens in the Tower of London wearing fifteenth century clothes, not knowing who or where she is. Struggling to piece together an identity for herself in modern day London, she deciphers from flashbacks the life she led over five hundred years ago, and the dark and dangerous relationship she had with King Richard III. Convincing the rest of the world and her boyfriend of this, however, is another matter. And as her memories grow more menacing, so do the avenging forces that stalk her. Meanwhile, across the Thames, Petra Sherry is a singer-songwriter who has been on a path of self-destruction ever since she was abandoned by the lover who inspired her music. Moving to London was supposed to be a fresh start for her and her band, but instead of working on a new album, she develops an obsession that sets her and River on a sinister and tangled collision course.