About a man and a woman who miss each other but cannot meet. Young-ho, a young man who took several tries to get into college, doesn't have any special goals in life, and starts exchanging letters with someone.

Always wearing a smiley face, Oh Ji-ah exerts herself no matter what, dreaming of a bright and shining future. But then, she is diagnosed with thymus cancer out of the blue. In spite of that, the company and her family force her hand as usual… While she is living her usual life, her friend Anna comes to see her. Anna, Jia’s role-model as the CEO of a company, suggests going on a tour around the country in a convertible the very next day but Jia refuses to go due to the pile of work she has to do and her upcoming surgery. And the day after, Jia faces the mourning portrait of Anna. Suffering from burn-out, Jia buys a ‘Cabriolet’ convertible with the money she saved up for surgery and takes off on a tour around the country.

It relates a time-slip story which takes Jung Yak Yong, known as Dasan, one of the greatest thinkers in the later Joseon period, from the past in 1818 to the present in 2022, as he becomes elected as the 20th president of the Republic of Korea. Jung Yak Yong was a Korean agronomist, philosopher, and poet. During his time, he wrote highly influential books about philosophy, science and theories of government and held significant administrative positions.

Four lifelong friends—Tae-jeong, Do-jin, Yeon-min, and Geum-bok—dreamed of an epic trip abroad, but life got in the way. Years later, older but not necessarily wiser, they finally embark on their long-overdue journey. Planned as a carefree getaway, however, the trip derails into a whirlwind of unexpected chaos, hilariously absurd detours, and buried emotions resurfacing. As they stumble through misadventures, their first ride together turns into a spectacular journey—one for the ages.