Centuries ago, humans and vampires lived alongside one another, sometimes hostile, sometimes peaceful—but always tense. Eventually, that tension tipped too far, and now vampires are few in number and known only as Pets, kept by the wealthy as intimate companions, most of their history lost, the rest shrouded in mystery.

Aubrey has returned home after spending many years away, though he is reluctant to live once more with his estranged father, his mercurial cousin, and the memories of his murdered mother.

The very last thing he wants is the Pet given to him as a welcome home gift, a practice he has long despised and wants no part of. But Ruthven is like no Pet he's ever encountered, and only the beginning of the secrets Aubrey slowly begins to uncover...