After her annulment is finalized, Enya Shanahan finds herself caught in a web of scandal and obligation while carrying a secret that threatens to shatter her family's reputation. Determined to find a suitable marriage for Enya, her father turns to a wily matchmaker to save them from their circumstances. Sullivan O'Brien, a steamboat captain committed to aiding enslaved people on their path to freedom, is faced with an ultimatum from his father. Forced to marry or lose his livelihood, a marriage of convenience seems to be the only solution. As he and Enya face the trials of their pasts and a city consumed by fire, they must confront their deepest fears and learn to trust in love, even when darkness threatens to engulf them.