Uncertain

Zack Chu has been working hard as a doctor from St. John Medical Center to save patient with COVID-19. His life change when he found a girl named Kristel Prin a teacher in Myeol University. Kristel Prin gets diagnosed with bone cancer. She is afraid to be inlove and get hurt by someone else. When she met Zack Chu she have a reason to live in this painful world but she doesn't tell her true feelings to Zack Chu. Kristel Prin wondering why Zack Chu didn't visit her for one week and she found out that Zack Chu died because of COVID-19 and it was to late for Kristel Prin to tell him how she loves him.