Kim Jae-hyun (Yoo Yeon-seok) is a sports manager and former talented basketball player. His only wish is to send a novice and promising player Kang Chul to America. To fulfill his wish, he must head to Busan to find and convince Kang Chul. Meanwhile, Bae Soo-jung (Moon Chae-won) works in an advertising agency and must also travel to Busan for a business trip. The two meet on the Korea Train Express and spend 24 hours in the unfamiliar city of Busan, South Korea.
Instead of calling her boyfriend, Yoon-jung accidentally calls a total stranger, Hyun-seung, a man who is having trouble getting over his ex-girlfriend. She ends up having phone sex with him and later, they become comfortable with each other and start talking about their respective relationship problems. They eventually decide to meet and a more intimate friendship develops, which leads to both falling for each other.
One fateful day, on his eighteenth birthday, Woo-jin wakes up to see a face and body that is not his own. He is very shocked and confused, he confronts his mother with his new appearance and she is also shocked but tearfully accepts him for who he is. With the help of his mother (Mun Suk) and his best friend (Song-beck), Woo-jin is able to cope with his strange condition. Ever since this day Woo-jin, now a furniture designer, wakes up in a different body every day, regardless of age, gender and nationality. Sometimes he's a man, a woman, old, young, or even a foreigner. He can even speak different languages, depending on who he is for the day. He's the same person on the inside, but on the outside he's always someone new. Looking at a different face in the mirror every morning is hard for him to get used to.
The first act of the film introduces the protagonists, a woman named Su-jin and a man named Chul-soo. The movie highlights their accidental meeting, followed by their subsequent courting despite their difference in social status that should have kept them apart. Kim Su-jin is a 27-year-old fashion designer, spurned by her lover, a colleague who was also a married man. Depressed, she goes to a convenience store, where she bumps into a tall, handsome man with whom she has a slight misunderstanding. Following that, she returns home and, receiving her father's forgiveness, decides to start life afresh.
The film tells the parallel love stories of a mother and daughter. The story of the mother is told partially in flashback (narrative)s.
K and Cream first meet each other in high school & both are orphans; K was abandoned by his mother after his father died of cancer who nevertheless left him a sizable sum of money, while Cream lost her entire family in a traffic accident. The two become soulmates and come to share a home, though K watches Cream switch from boyfriend to boyfriend as he keeps his own feelings for her to himself. Knowing that Cream's biggest fear is to be left alone, K keeps the fact that he has terminal cancer a secret, and instead he urges her to marry a kind and healthy man. When Cream announces that she is in love with affluent doctor Joo-hwan, K is left heartbroken, but is satisfied that she has met her ideal partner.
Hong Seol (Oh Yeon-seo) is an ordinary university student. She is busy working part-time jobs to pay for her tuition fee and living expenses. Yoo Jung (Park Hae-jin) is her senior at the same university. He seems perfect. He comes from a wealthy family, he has a kind attitude to others and he is handsome, but Hong Seol does not feel comfortable with Yoo Jung. Suddenly, Yoo Jung comes and talks to her. He wants to go out on a date and they begin an awkward relationship.
병에 걸린 청년이 그녀를 외롭고 수줍어하게 놔둔 후, 한 젊은 여성은 친절한 수족관 직원과 친구가 됩니다. 그가 결혼을 제안했을 때, 그들의 사랑은 두 가지 큰 도전을 가져옵니다.
Debt collector Nam-soon (Kwon Sang-woo) lost his sense of pain after a traumatic accident during his youth, and now regularly takes beatings for his job. Street vendor Dong-hyun (Jung Ryeo-won) suffers from severe hemophilia, a disorder that impedes the body's ability to stop bleeding. For Dong-hyun, even the most minor of injuries could be deadly. She's left homeless after Nam-soon collects the last of her money, so he decides to take her in. As the two grow closer, Nam-soon suddenly begins to lose his lifelong insensitivity to pain and the hurt of a lifetime washes over him. Together, these two lonely souls learn to hurt and hope again...
Nineteen-year-old Li Myung-hoon (T.O.P (entertainer)) never imagined he would become a killer. Born to a privileged life in North Korea, his dream was to become a pianist. But when his father, a North Korean spy, dies disgraced, Myung-hoon and his younger sister Hye-in (Kim Yoo-jung) are sent to a "guilt-by-association" Prisons in North Korea. Their father's superior, high-ranking military official Colonel Moon (Jo Sung-ha) proposes a deal to Myung-hoon: if he goes down to the South as a "technician" (an assassin) and finishes what his father had failed to accomplish, he and his sister will be released from the prison camp. Myung-hoon accepts the deal and undergoes two years of intense training.
그리워하지만 만날 수없는 남자와 여자에 대해. 대학에 진학하기 위해 여러 번 시도한 청년 영호는 인생에서 특별한 목표가없고 누군가와 편지를주고 받는다.