Saying goodbye to her twenties, thirty-year-old Go Sa Ri welcomes this new decade of her life with open arms. Leaving behind the tangled mess of her twenties, Sa Ri is ready to make a fresh start. But walking away from the past is proving more difficult than she ever imagined.

Se-jin, a high school student, becomes pregnant and gets ostracized by her family and school. While wandering the streets, she meets Joo-yeong, an experienced runaway, and tries to get an abortion with Joo-yeong's help.

Mi-joo, a telemarketer, begins an ominous day on her way to work, with her ankle sprained by a motorcycle and got called out by the team leader at the morning meeting. The name "Hyeon-soo" that comes across the phone reminds me of "Hyepn-soo," who left the company after a fight. A middle-aged woman approaches Mi-Joo, who returned home struggling with her injured ankle. "I'm Hyun-soo's mom." Hyeon-soo, who lives with Mi-Joo, leaves home after a quarrel. He visits a bank to check the piling credit card debts and while writing his resume at a computer shop, he discovers his parents’ growing age. Hyeon-soo, who visited the university club again, recalls the days when he first met Mi-joo and began to love her after discovering her short film. Just in time, Hyeon-soo bumps into his young juniors and offers to shoot something with a camcorder. How do you remember someone's last expression?