A cunning woman sees the CEO's sister being struck by kidnappers and bravely uses her body to shield her from further harm, clearing herself of suspicion and gaining the CEO’s sympathy. Determined to secure her place as the wife of a wealthy man, she repeatedly tries to eliminate the girl. First, she bribes the housekeeper to sprinkle a deadly powder on the girl's favorite teddy bear, causing a severe allergic reaction that night. The cunning woman frames the girl as the culprit, and the CEO locks her in a warehouse, publicly humiliating her by stripping her down. It isn't until he sees the paternity test that the CEO realizes the girl he humiliated is actually the one who saved him that night.
