Kim yoo the illegitimate daughter of the kang'family was treated less than a servant in the kang'family house. Kim yoo who was meek and always trying to please others and wouldn't say or do anything against her step mother and sister even though they maltreated her suddenly changed after marriage to her sister fiance what happened to the meek and gentle Kim who is this mad woman claiming to be her and wasn't mr mu supposed to be ruthless and aloof how come he follows his wife every word. Kim: honey she slapped me. mr u: cut her hands. Kim: honey i want 10% shares in the Lu's company. mr mu: just ten the whole company is yours.