Un amor adolescente los unió, pero la vida los separó. Diez años después, unos jóvenes se reencuentran para afrontar el desamor, el presente y nuevos desafíos.
Yeon Tae-seo se muda al campo con su hermano pequeño para pasar una temporada con sus abuelos. Allí conoce a Mo Eun-a y entre ambos surge un vínculo especial.
La relación entre Tae-seo y Eun-a sigue creciendo y pasa del enamoramiento a la intimidad. Pero la llegada a la vida adulta los distancia y pone a prueba su relación.
From school to relationships and work, Tae-seo struggles to juggle his responsibilities. Meanwhile, Eun-a’s career begins to reshape her life.
Ten years later, Tae-seo and Eun-a live completely different lives. One day, they cross paths again by chance — stirring old feelings.
Eun-a and Tae-seo slowly settle back into their rekindled rhythm. Meanwhile, they both navigate challenging personal and family issues.
Despite help from Bae Seong-chan, Eun-a struggles to find her place in the world. Tae-seo deals with unease as he confronts his family’s health issues.
Eun-a makes a decision that forces her and Tae-seo apart again. Soon after, a major misunderstanding leaves him heartbroken and betrayed.
Before long, Tae-seo's life returns to how it was before he reunited with Eun-a. But the question of why they broke up still lingers in his mind.
Eun-a decides where she will go, while Tae-seo decides how to say goodbye. Will their love endure -- even until the very last moment?