Lin Thoren, a minor Norse goddess, is both beautiful and terrifying. While her powers have diminished over time, she can still move faster than light, shapeshift for short periods of time, and throw a grown man across the room. All of these skills make her a particularly adept Private Investigator. Mary Lambert has just earned her Master's degree in creative writing and aspires to be an author. Lin hires her to be a live-in ghostwriter and record her memoirs, which cover many eras, cultures, historical events, and criminal cases. As Lin recounts a tale about trafficked women hidden in a D.C. suburb, Mary begins to realize just how powerful her host is. Soon, Mary finds herself becoming an integral member of the Thoren household-in more ways than one.