With his frail physique and meek nature, Kwon Mi-eum is in no position to repay his father's considerable debt. Seizing the opportunity, the crooked lenders hold his father hostage and coerce Mi-eum into a simple job: to infiltrate the affluent household of Baek Jitae and report his every move. Mi-eum's role is an unusual one—to assist Jitae with his bath. But Mi-eum's insecurity and awkwardness amplify the pressure he feels, which leads him to unintentionally disrespect his new boss and jeopardize his mission. Curiously, Jitae's interest in Mi-eum grows each day, and Mi-eum starts to wonder if he is really playing Jitae or if the tables have turned. [Written by MAL Rewrite]