Trapped in a world of straight expectations, queer marquis Emile longs for independence. So, when his aunt declares he must marry to produce an heir or be disowned, he runs away disguised as a servant until he can come of age and reclaim his inheritance.All Emile needs to do is keep his head down and bide his time, but he quickly stumbles into a mystery beyond his imagination. While working in the service of the intimidating Count Montoni and his family, Emile learns that they suffer from a strange affliction every full moon, which requires full sedation. And when he discovers a mangled corpse on the estate the same night as suspicious family arguments break out, he reports it. But Emile cannot guess what lengths Count Montoni is willing to go to to keep his family's secrets safe. As Emile becomes more entangled in the household and its paranormal origins, his inquiries draw the attention of the handsome doctor, Bram, and the count's charismatic nephew, Henri.But how can Emile earn the esteem of the earnest doctor, while keeping his own identity and desires a secret? And how can he trust-let alone love-Henri, a man as mercurial as the ever-changing moon? To find the love he deserves and survive the Montoni family, Emile will have to risk his title as well as his life.