A mysterious detective known as the “cage user” is embroiled in a farcical hunt across 1800s Europe for her missing body.

In the late 1800s, vampires, werewolves, and other monstrous beings exist alongside humans. Aya Rindo, an immortal detective with no body from the neck down, travels across Europe solving a myriad of strange cases with the help of half-demon, half-human hybrid, “demon-killer” Tsugaru Shinuchi, and her devoted lady’s maid, Shizuku Hasei. But their journey has another purpose, to seek out Aya’s stolen body…