Ha No-Ra (Choi Ji-Woo) once dreamed of becoming a dancer, but she unexpectedly became pregnant at age 19 and had to quit school and get married. For the next two decades, her life revolved around being a housewife and mother. Now 38 years old and on the brink of divorce, No-ra is mistakenly diagnosed with terminal pancreatic cancer and given a six-month prognosis. So she decides to go back to school and experience college life for the first time. Among the incoming freshmen are her own 20-year-old son Kim Min-Soo (Kim Min-Jae) and his girlfriend Oh Hye-Mi (Son Na-Eun), who are horrified to have No-ra as their classmate. Unbeknownst to No-Ra, her intellectual snob husband Kim Woo-Chul (Choi Won-Young) recently accepted a job teaching psychology at the same university, and her prickly theater arts professor turns out to be Cha Hyun-Suk (Lee Sang-Yoon), who had a crush on No-Ra in high school.