Se Jung and Sung Min have, from all appearances, a happy and loving relationship, despite the fact that Sung Min is a cyborg. Se Jung is a scientist by training who met husband Sung Min in graduate school. However, the sudden appearance of former classmate Ji Ah, coupled with Sung Min beginning to remember his past, causes Se Jung to question the decisions that led to her current situation in life.

Young Jung dropped out of seminary and now works as a driver for a service called "Twenty Thousand Won to Pyongyang". He is estranged from his mother, and Joon Young, his best friend from seminary, is now a priest, leaving Young Jung feeling rudderless in his new life outside the seminary. However, Young Jung's life quickly becomes even more complicated when he meets So Won, a Sunday school teacher from Joon Young's church. In order to navigate his new life, he must confront his past.

To 19-year-old Cha Junho, there's something much more urgent than his grades, future dreams, or college. It is to lose his virginity. He begs and pleads his girlfriend Seogyeong, but why is the world so cruel? She seems willing at one moment but then backs off. Will Junho's wish come true before the year is over?