A question from the IQ contest about the night they first met Doo Il makes the family curious. Only Franceska knows the answer, but she's not telling. Kyun introduces his new best friend Yong Joo to Ms. Park, and they run into Hye Ryun, an old friend of Hee Jin's. Joo Hyun shows up at the house saying he ran away from home and needs a place to stay. Sung Joo, a man who Elizabeth had previously dated, reappears in her life and Franceska takes notice. Finally, the doctor Eizabeth and Kyun fought over appears, making for a complicated web of feelings. (source: MDL)