When war-haunted Tristan takes a job guarding Mark's exclusive kink club, everything shatters with the arrival of Mark's fiancée, Isolde.Inside Lyonesse, Mark curates control, Tristan guards the door, and Isolde tests every forbidden boundary as tangled desires ignite between all three in this sizzling romance from USA Today bestselling author Sierra Simone.Tristan Thomas is lost. After leaving the army, the young former soldier is in limbo. Until, that is, he's hired to guard Mark Trevena, the owner of DC's ultra-secret club, Lyonesse. Slowly, he's drawn into Mark's dark, seductive world of power and desire, even though Mark is everything Tristan knows he shouldn't want: cruel and wicked and shamelessly amoral.But protecting Mark isn't Tristan's only duty. Soon, Mark asks him to guard his bride-to-be as she travels home from Ireland on Mark's yacht. Tristan is obsessively jealous, but the former soldier in him is made to obey orders, and as it turns out, Isolde Laurence is nothing like he expected. Young, sharp, and bewitching, she's being pushed into this marriage by her family, and as the two travel back to America, Tristan finds himself enraptured with the woman behind the reserve.One night, while sailing under the cold stars, Isolde and Tristan share a searing kiss. From there, it's a fast fall into the forbidden for all three of them.In a world where every touch is a negotiation and every secret fuels temptation, pleasure and power blur until one reckless choice sets a love affair on fire.