Caelan, a sweet ragdoll cat shifter, has spent his whole life hiding his ears, his tail, and his needs to keep his childhood fiancé happy. When he takes a stranger's place in a wedding carriage, he thinks he's finally marrying the man who promised to love him. Instead, he becomes the accidental husband of Severin, Blackthorn's feared 300-year-old vampire duke.
To everyone else, Severin is dangerous. To Caelan, he's the man who offers honey cakes, builds him a swing, and always asks, "May I?" For the first time, Caelan dares to laugh loudly and say what he wants.
But when his childhood fiancé returns and the mistaken marriage is exposed, Severin's fear of losing him leads to another betrayal of trust. With their marriage about to be annulled, Caelan must decide: cling to an old promise, or choose a love that finally lets him be himself?