Even though this novella takes place 20-some odd years before the first book in the Rumor series, Forever and a Day, I would suggest reading Forever and a Day first. That way, you are not spoiling some of the story from Forever and a Day. Plus, I personally enjoyed seeing Leonard first as an older gentleman in the role of Roderick's father, and then in the novella as his younger self finding love for the second time.
Leonard, the Duke of Wentworth, has set his eyes on Lady Augustine. He is ready for marriage again after seven years of mourning his first wife. Lady Augustine has different plans though. She is consumed by a family tragedy and does not think she could make any man happy until she gets some answers.
I found this to be a very bittersweet novella. It was also pretty humorous. Leonard's dialogue, especially, was very amusing. I'm now very much invested in finding out what happened to Nathaniel. Looks like I will have to wait until July when Forever a Lady is published to learn more.