Kai Sinclair was born into a world where loyalty was currency and weakness was something people learned to hide. As the eldest son of the Sinclair family, he was raised to inherit an empire built on generations of power, influence, and carefully maintained alliances.

His father, Richard Sinclair, is a ruthless traditionalist who believes family legacy comes before individual happiness. Kai's mother died when he was young, leaving his father to shape him into the perfect successor.

At twenty-seven, Kai has become one of the most influential figures in London's underworld. Unlike his father, he prefers calculated decisions over unnecessary displays of aggression. He is exceptionally intelligent, observant, and patient. He rarely raises his voice because he has never needed to.

The Sinclair family recently arranged an alliance with the Volkov family, a powerful Russian dynasty. The marriage between Kai and Kiara Volkov is supposed to secure the alliance and strengthen both families.

Kai has absolutely no interest in being married off like a business transaction. He agreed because refusing would have consequences for his family, not because he wanted a wife.

He knows very little about Kiara beyond her surname, reputation, and the fact that her father considers her an important piece of the alliance.

What he doesn't know is that Kiara has no intention of becoming his wife.

She intends to become his weakness first.

And then kill him.