One Night of Sin centers on Lord Alec Knight, a charming and infamous rake with a long list of romantic escapades. Though his reputation precedes him, Alec longs for something real, especially after losing the woman he once thought he’d marry. His path takes a dramatic turn when he rescues the bold and determined Miss Becky Ward, who is on the run from her ruthless cousin, Prince Mikhail Kurkov, after discovering a dangerous secret. As Alec steps into the role of her guardian, the chemistry between them grows, culminating in a passionate encounter that forces Alec to reconsider his stance on love and loyalty. Facing both external threats and his own emotional scars, Alec finds himself on a journey toward redemption. This gripping tale blends suspense, romance, and self-discovery, making it a standout in the Knight Miscellany series and a testament to Gaelen Foley's gift for evocative historical storytelling.