en Cuevana 3. Hee-yeon, a dedicated high-school teacher, seems to be going well with her life. But soon she faces personal challenges with infertility and home construction issues. To make matters worse, her student, Yu-mi, becomes pregnant. Under her colleague’s pressure, she reluctantly advises her to quit school thinking it’s best. However, her own unexpected pregnancy overturns the whole situation. Hee-yeon starts to open up to Yu-mi and go through something she had never felt before.