Ella descends from high aristocracy into harsh domestic servitude following her parents' demise, enduring cruel mistreatment from her scheming stepmother and vain stepsister. Smuggling herself into the royal masquerade gala, she shares a magical waltz with Crown Prince Alexander before fleeing into the night, leaving behind a delicate glass slipper. Determined to seize royal riches, her ruthless stepsister brutally binds and mutilates her own foot to squeeze into the relic.
Reduced to an unranked chambermaid in the imperial castle, Ella must clean corridors alongside the very prince searching for her. Alexander senses an inexplicable familiarity in Ella's graceful composure and gentle touch, despite her stepsister's treacherous attempts to poison the maid. As court intrigue mounts, Ella must expose the gruesome fraud before Alexander is forced into an illegitimate royal wedding.