When falling in love means risking everything, an angel must decide if losing his heart is worth it.

Lam is an Agnus Dei—or a messenger angel—who deals with mortals and the Four Horsemen. He's helped them to find love and become mortal again, but he can't seem to figure out his own relationship. Of course, it would be so much easier if he hadn't fallen for Lucifer Daystar, the most infamous angel out there.

Lucifer Daystar has loved Lam since the moment he saw him. They've hidden their relationship since Lam isn't supposed to fraternize with Day. He wishes things could be different, but he won't risk Lam getting into trouble for being with him. Then one day Lam disappears and Day must search the world to find him.

When Day rescues him, will Lam have decided loving a fallen angel isn't worth the pain?