She who sacrificed herself to save others accidentally transmigrates into a parallel world, reduced to a low-ranking floor-sweeping palace maid in the imperial court. The deep imperial compound is strictly stratified and riddled with undercurrents, where low-level servants toil endlessly day by day while treading on thin ice to avoid trouble, and the slightest carelessness will bring disaster. Unwilling to be trapped in the deep palace living a mediocre life for a lifetime, she resolves to carve out a world of her own by her own efforts. The accompanying angel system becomes her capable assistant, continuously issuing tasks and unlocking various skills, helping her master the techniques of handling affairs and learning the ropes.