So, who really is this Patient Zero? And how has she suddenly become such an important person to the daughter of this hospital's Head Doctor?                      

This summer, Choi Yena has made a new friend, the special one she has never had before.   As time went by, an unfamiliar feeling started to grow on her.   Because of one's friendship and fear, it is easier not to acknowledge it.   .....

Since when Jo Yuri appeared on Idol School, Choi Yena had a huge crush on her. Little did they know, that destiny will bring them together on a new survival show called, Produce 48.