Mary is a young woman who longs for something more in life. She is Rosie's daughter, a kind and caring mother who has always supported her. However, Mary feels lost and directionless. She meets Alastor, an Overlord who is passionate about radio. At first, Mary is put off by Alastor's sinister and spiteful ways, which he learned during his years on Earth. However, when a demon threatens her life, Alastor comes to her rescue and proves that he is more than just a menacing figure. As Mary gets to know Alastor better, she begins to see that he is pretty intelligent and has a good heart. However, the demands of his job as an Overlord leave him blind to Mary's feelings for him, and she takes up writing to try to distract herself from her unrequited love. Things become even more complicated when Alastor's enemy, Vox, tries to come between them. Alastor must act quickly to protect Mary and their budding relationship. But with so many obstacles in their path, will they ever be able to find the love that they both deserve?