Yi-hyun spends her school days differently because of her ingenious photographic memory. One day, Yi-hyun was out to catch Pal-bok, who scammed her mother, when she met Kyung-du for the first time…

After Yi-hyun gives birth, she writes a letter to Kyung-du saying she will not be returning. On the other hand, Yi-hyun goes to Seoul and finds herself not being able to remember anything from 1997 to 2007…

Yi-hyun is told that she does not have any brain damage and decides to wait for her memories to return. On the other hand, as Kyung-du was raising Hae-deum, he sees Yi-hyun on TV…

Kyung-du goes to Yega Group, gives Yi-hyun a hug, and bursts out in tears when he sees her, but Yi-hyun only remembers him when she met him at Jo Pal-bok's housea as a student. Soo-chang tries to tell Yi-hyun what happened during the past 10 years...

While Yi-hyun and Kyung-du were arguing, Kyung-du's embraces Yi-hyun and is Yi-hyun is troubled by the comfort and familiarity of the touch. Hae-young persuades Sun-young to be honest and let it all out…

Yi-hyun ends up spending time with Hae-deum at Jeju by coincidence and begins to feel motherly affection for her. Kyung-du receives help from Yeon-jeong and tries to catch Jong-tae, who disappeared with his money and is now on the run…