Lady Sarah Hartford is beautiful, wealthy, widowed, and bored. After agreeing to a scandalous dare to seduce a stranger into her bedchamber, she meets the devilishly handsome doctor, William Gordon. Though both keep their true identities hidden, an intense romance blooms between them, and Sarah finally feels like she could be happy again.
After a three-day affair ends when they arrive in London, William promises to reunite with Sarah after dealing with his ailing father, the reason to which he was summoned to London. But three months pass, and Sarah begins to lose hope of ever seeing her lover again.
Until one day, when he arrives on her doorstep, married, a duke, and with a pregnant duchess in tow. As the pair try to untangle truth from lies while keeping their history a secret from everyone around them, they realize they may never be together.
