A demon by the name of Ash befriends Ana, a young woman who is the healer for her village. The more they talk, the more he feels the need to protect her, as demons can follow one another’s scents, and he does not want to put her life in jeopardy.
To protect her, he marks her with his demonic seal, which allows no other demon to harm her, except for those who went their own way long ago and do not follow the laws of the demon realm. They use her seal to track her down and attack her, forcing Ash to intervene and take her to the demon realm, where the others cannot go due to their corrupt ways.
After several weeks of living with Ash and his siblings, Ana finds herself alone with Ash and takes a risk that she hopes she won’t regret, as she indulges in some rough sex.