"The Secret of Birth" Lee Jin is completely shocked when she sees Sung Yoo Ri's return.

April 28, the 2nd episode of the SBS weekend drama "The Secret of Birth" featured Lee Sun Young (Lee Jin) completely shocked after seeing Jung Yi Hyun's (Sung Yoo Ri) return.

Jung Yi Hyun tries to get some clues of the ten years of her life that she cannot remember by looking through her bank statements. She learns that there was a large amount of money transferred to her account from a company. Jung Yi Hyun decides to contact the company.

When Choi Suk (Lee Hyo Choon) sees Jung Yi Hyun, she seems to be mad and tries to hit her. However, she just says, "What a sly girl. I waited a long time. What happened to your father is not your fault. It was beyond all of our control."

Jung Yi Hyun then follows Choi Suk to her home and sees her friend Lee Sun Young (Lee Jin) there. Jung Yi Hyun says, "Sun Young! It's me, Yi Hyun!" However, Lee Sun Young does not greet her. Instead, she seems unpleasantly shocked.

Previously, Lee Sun Young's older sister had told her, "Sun Young had to get treatment after doing that to you" and gave out a hinted that something bad had happened between Jung Yi Hyun and Lee Sun Young.

Even though 10 years of her past had been erased from Jung Yi Hyun's memories, it has only been a year since she left the company. Lee Sun Young's reaction to Jung Yi Hyun made it clear that there is an interesting story hiding behind their relationship.