In the summer of 1994, as a time capsule was buried under Namsan to mark Seoul’s status as the capital, Sol suddenly breaks up with her boyfriend Hyun. Hyun insists that placing a ring in the capsule will seal their eternal love, but Sol doesn’t believe him. In 2024, a time capsule park guide and an antique shop worker who both resemble Sol and Hyun meet a woman claiming to have come for the capsule. As they stroll through the park, the man is drawn to her and offers her a ring.