She was trained to bring him down. He was born to rule the darkness. Falling for each other? That was never part of the mission. Sia Verma, an elite undercover agent, walks into the lion’s den — a world of crime, secrets, and power. Her target: the mysterious mafia kingpin known only as Sir. Cold. Ruthless. Untouchable. No one sees his face. No one dares speak his name. But when fate throws them together in a twisted game of deception, desire, and danger, Sia finds herself entangled in a deadly dance — one that threatens her mission… and her heart. What happens when the woman sent to destroy the devil ends up craving his touch? In a world where loyalty is a lie and love is a weakness, their connection is the most forbidden sin of all.