Twenty-year-old Sang Eun is developmentally delayed and thinks like a 7-year-old. She spends her days making intricate origami designs and dreaming of marrying her Prince Charming, just like in the books she reads. Her mother dotes on her and tries to do everything in her power to shield her from harm. But Sang Eun begins to experience adult emotions when she falls in love with a police officer. How much longer can Sang Eun’s mother continue to protect her daughter?