The Truth is reveal

The scene start off with Yi Kyung protecting Seo Yeon.
we can see that Seo Yeon was a child who cause trouble while Yi Kyung always help her out. When Yi Kyung help her out , Seo Yeon was the one in the wrong and broke a boy snowglobe, and Yi Kyung trying to be a responsiple olfer sister try to her her out. They work hard and try to earn money to pay the boy back for the snowglobe.
Later as they go home, we can see that the mother favor Yi Kyung more, while the father, DEtective Kang favor Seo Yeon more. They also have a little brother too. And the parents made them believe they were twin.
To pay back for the snow globe they work hard and finally achieve the money, but Seo Yeon often gets jealous of Yi Kyung for the mother favor her more. Then problem arise as Seo Yeon gets jealous and burn the painting and everything get burn. Yi Kyung who wants to protect her say that she was the one who made the fire and that the hairpin was her. The hairpin was at the crime scene. Yi kyung gets heavily punish by the dad, then later the girls make up.
Later the next morning the family went to the amusement for the dad got promoted as they went home the Chief was waiting for them. The chief and the dad went out for some drink, but the dad forgot his wallet and the wife came to bring him his wallet. She then overhear their discussion and find out that Yi Kyung is the daughter of the man who kill her husband.
SHe then go home and searches for adoption paper and she found the adoption paper of Yi Kyung and at that time her husband come home and she confort him. then he end with I was wrong and she slap him

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