Hughie Venables-Smythe discovers the world of the professional flirt. A timeless art, it can save a marriage or lift a heart faster than any therapy. 

Letitia Vane runs a bespoke lingerie shop in Belgravia and understands exactly how to make a woman feel beautiful. However she cannot let her guard down and fall in love, least of all with Hughie.   

Olivia Bourgault de Coudray is enduring an unhappy marriage to a very wealthy man. When a series of beautiful handwritten notecards begins to arrive, containing intriguing clues, her interest is piqued. Unfortunately the same clues are being delivered to Letitia.