Synopsis: The Concubine Contract

Yeseo, the most lethal assassin in the Seong Empire, rarely encounters a challenge that stumps her. However, when Emperor Ahon tasks her with uncovering a spy hidden within the palace walls, Yeseo must also adopt the persona of his new concubine, a vapid airhead, to maintain her cover. Juggling a lovey-dovey performance by day while tirelessly tracking down the enemy under the cover of night tests her patience and intelligence. Yeseo can't wait to complete the mission and cash in on a handsome reward. Unfortunately, there are too many dubious individuals in the court, and the complex web of allegiances further muddles the case at hand. Can Yeseo unveil the elusive spy before the facade crumbles, and she loses all her wits?