Gabriel Blackstone's world is divided quite clearly into castes: everyone knows their place and abides by it. As an inventor in the merchant caste, his life is predictable in its routine until the night his best friends and assistants, Caleb and Andrew, purchase the time—and body—of a companion for his birthday. As an activist in the Caste Equality movement, everything Gabriel believes in tells him to refuse the gift, but then he meets Lucio. The beautiful and alluring companion is far more than the vapid courtesan he'd expected, and he can't get the man out of his mind. After that night, Gabriel tells himself to forget about Lucio, but a chance meeting at a ball makes it clear neither of them is willing to ignore the compelling chemistry between them. It will take all their combined trust and cunning, plus the help of a wily aristocrat and a plucky political activist, to overcome the challenges of infidelity, abuse, and social stigma that lay along their road; however, Gabriel knows it will all be worth it if at the end of the day he can call Lucio his own.