Beneath the rich aroma of roasted coffee and the relentless drumming of rain in the capital, "Nil"—codenamed "Onyx"—operates as a cold-blooded, top-tier assassin. Her latest assignment forces her to go undercover as a café owner to monitor "Benja," an innocent, unsuspecting book restorer who unknowingly holds a devastating national secret.
Her mission is clear: deceive, extract, and eliminate.
But the closer she gets, the more the radiant warmth of her target's smile begins to melt the thick ice encasing the assassin's heart.
As love takes root in a barren soil of lies, and duty violently clashes with desire, Nil is forced to make an impossible choice: remain loyal to the organization that forged her, or commit ultimate treason to protect the woman she loves. In a lethal game of cat-and-mouse, both their lives and their hearts are on the line.
"I came here to end her life... but she ended mine with her love."