The love story between a top actress and an airline director who each suffers an unusual phenomenon. He suffers from prosopagnosia, while every month she transforms into someone else for a week.

With help from a young woman with synesthesia, a cop who lost his sense of pain tracks down the serial killer who brought tragedy to both their lives.

Sang Tian is an aspiring figure skater. On the day she turns 18, she vows to her family that she will be accepted to the same university that her mother once attended. To get in, she must pass a test, which she – an exceptionally competent skater and student – expects to ace.

A man who can’t distinguish faces meets a woman who is unforgettable. Lee Yoo Chan is the founder and CEO of the IT company Next One, which has become the most desirable place to work. He suffers from a condition where he can’t recognize faces, and this makes him very guarded and mistrustful of most people. Kim Bo Ra is the pride of her hometown on Jeju Island who came to Seoul to attend college. With her imminent graduation, her dream is to work for Next One. When Bo Ra meets Yoo Chan, will both their lives change in unexpected ways?

Veekit is a stoic young CEO with prosopagnosia or "face blindness," meaning he can't distinguish people's faces. For this reason, he decides to hire an assistant to help him connect with the rest of the world. Mirin becomes the girl responsible for that. Will it be possible to have a relationship beyond employer and employee?

Young girl Lu Hui, is born with severe face blindness and is used to keeping a distance from people. On his first day back at school, Long Chengzhou, an international exchange student at Decheng University, helped Lu Hui, who was being suspected for plagiarism. However, Lu Hui acted like she has never seen him before since then. With that, he vowed to make Lu Hui fall under his charm, but he was moved by Lu Hui's frankness and sincerity, optimism and kindness, and fell in love with her in the process of approaching her first. After discovering the secret of Lu Hui's face blindness, he turned into a boyfriend in shining armor to protect Lu Hui, and tried to make the face-blind Lu Hui remember himself. Unknowingly, he has become a special person in the eyes of Lu Hui. As if it is the secret guidance of fate, the two who have met long before fall in love...