Corporate slave Tang Yu time-travels to become the senior maid of Jiang Lingchuan, the brocade guard commander of the Jian'an Marquis's Manor. Facing the moody male lead, Tang Yu has no romantic illusions and only wants to survive with her culinary skills and sobriety, save money, and run away. However, Jiang Lingchuan is set to marry Yang Lingwei, the youngest daughter of the Yang family, due to an arranged marriage. Tang Yu faces the crisis of being hated by the future mistress, compounded by discovering the Marquis treating Jiang Lingchuan as a pawn, which completely shatters her wishful thinking and resolves her to accelerate her escape. In the inner courtyard, she uses medical knowledge to befriend Heir's wife Lady Cui in exchange for protection, placates the male lead with double-dealing, and secretly plots her way out of the manor.