Hakushaku to Yousei

Lydia Carlton is a fairy doctor capable of seeing and speaking with fairies. She travels to London to visit her father but is taken against her will by a man named Edgar Ashenbert, who claims to be an earl. He asks for her help in finding a sword that will confirm his noble status. Though skeptical of his story, Lydia agrees to assist him, as he is her first client. At the same time, reports of a serious burglary circulate, and the suspect appears to closely resemble Edgar.