My Sister, the Warlord — Episode 13

Abandoned by their parents, the Blackwood sisters, Catherine and Grace, grew up relying only on each other. As adults, both achieved success. But at Grace's engagement party, Catherine arrives straight from an undercover mission—still disguised as a janitor—becoming the target of ridicule by Grace's in-laws and former classmates. When her sister is betrayed and humiliated by her fiancé, Catherine reveals her true identity as a female warlord, making everyone bitterly regret underestimating the sisters.