Society's most exclusive invitation...

Welcome to the Phoenix Club, where London's most audacious, disreputable, and intriguing ladies and gentlemen find scandal, redemption, and second chances.

After Miss Kathleen Shaughnessy is seen kissing a gentleman in a Gloucestershire garden, she's sent to London to avoid scandal. She doesn't, however, plan to abandon her research of mating rituals, and she knows the perfect person to provide assistance: her brother's best friend, Lord Lucien Westbrook, who is renowned for helping others.

Disdained by his haughty father, Lucien runs the Phoenix Club, an inclusive community where no one is ostracized or overlooked. It's also a secret rendezvous for the Foreign Office, where important connections are made, and information is passed—until a scandal ricochets through the club and threatens Lucien's position with his superiors.

As Lucien works to maintain control of the club, his best friend's sister seeks his personal expertise and assistance with researching the "science" of mating. He can't possibly say yes, but the more time he spends with the genuine and captivating Kat, the weaker his resistance. He's soon battling his desire for her as well as the powerful forces who wish to push him out of his club. When Kat is thrust into real danger, Lucien will stop at nothing to protect the woman who has stolen his heart.