Emiko Soong, newly minted Sentinel of San Francisco, just can't catch a break. Just after she becomes the guardian for a sentient city, a murder strikes close to home. Called by the city and one of the most powerful clans to investigate, she traces the killer whose scent signature bears a haunting similarity to her mother’s talent.

The trail will lead her back to Tokyo where the thread she pulls threatens to unravel her whole world and bring dark family secrets to light.

Meanwhile, the General rises in the East and Emiko must fight the hidden enemies of his growing army who are amped up on Blood Jade, while keeping her promises to her brother Tatsuya as he prepares for his tourney.

Her duties as Sentinel and her loyalties collide when she must choose between hiding her deepest shame or stopping the General’s relentless march.