Yoon Chae-ok, now free from the Najin parasite, wakes up in modern-day Seoul with no recollection of her past life. She is a vibrant, carefree college student majoring in art history, living a simple and happy life. What she doesn't know is that she is pregnant-a remnant of the love she once shared with Jang Tae-sang, a love she no longer remembers.
Meanwhile, Jang Tae-sang is still trapped in his 1940s self. The Najin parasite, still residing in his brain, has made him immortal and incapable of aging. With his memories intact, he carries the burden of knowing everything: their love, their struggles, and Chae-ok's current condition. For decades, he has been searching for her in every era, following traces of her presence through time, unable to let go of the woman who once made him feel alive.