Centuries ago, a female samurai died in battle defending the honor of her master, only to resurrect as something stronger, faster, and far more lethal than she'd been. Surviving the centuries, learning to blend with times, she and her sisters, those like her she found, lived as shadows, hunting the night. Now, these sisters are determined to keep the world from knowing about what lurks in the shadows, however, the shadows aren't content to remain in the dark... Zenshi Jin Ronin, Shia to most, survived through the centuries protecting humans from things that go bump in the night, but when she bumped into Detective Ryan Calder late one night she discovers that there's more to humans, and demons, than she's ever encountered before. Now, she has to keep one street smart detective from learning too much about the darkness and demons who she's been dealing with for over a thousand years. An unknown source has unleashed Rissu demons on the Nation's Capital, meanwhile she has to keep up her job as Medical Examiner and help solve her normal caseload. But as much as Shia tries to keep things balanced, things are changing. And new allies are gathering to her side, promising an upcoming battle requiring more than she's ever given before.