미세먼지로 뒤덮인 세상, 태어날 때 맞아야 하는 고가의 항체주사를 맞은 C들은 100세의 수명을 누리고, 그렇지 못한 N들은 30세에 끝나는 수명에 맞춰 전혀 다른 삶을 살아가고 있다. 평생 C인 줄 알고 살았던 스물여섯의 대학생 이오(최성은)는 태어날 때 병원측의 착오로 항체주사를 맞지 못했다는 사실을 알게 되고, 예전에는 아무 관심 없었던 N들의 삶이 궁금해진다. 그 중에서도 학교의 유일한 N, 조안(김보라)의 삶이.
The world is covered with fine dust, and Cs, who were injected with expensive antibodies at birth, enjoy a life expectancy of 100 years, while Ns, who were not injected, live a completely different life, with a life expectancy of just 30. Having lived her entire life as a C, 26-year-old college student Io finds out that she was not given the antibody injection at birth thanks to a mistake at the hospital. Now, Io begins to wonder about the life of Ns, which held no interest for her before. She’s especially interested in Joan, the only N in the school. What does life look like when we know what’s coming? The fact that the lives of the two young people who meet in the scheduled time are not clear may not be due to only the clouds of fine dust that hit the world. A story of two young people dreaming of a beautiful future with sincerity and love for each other is touching and unfolds beautifully in an opaque future that does not know how to unfold.
世界已被霧霾覆蓋，每個人在出生時需要注射高價抗體「C」才會有百歲壽命，而沒有注射的人「N」則按照30歲壽命結束的劇本，過著完全不同的生活。一生以為自己是「C」的26歲大學生李奧，卻發現醫院在她出生時發生錯誤…
В мире, окутанном мелкой пылью, C-люди, которым при рождении были сделаны дорогостоящие инъекции антител, живут в течение 100 лет, в то время как N-люди, которые не получили инъекций, живут совершенно другой жизнью до 30 лет.
26-летняя студентка колледжа И О узнает, что ей по ошибке не сделали инъекцию, и начинает задумываться о жизни N-людей, особенно о единственной такой девушке в ее колледже - Джо Ан (Ким Бо Ра).
