Yaeun Chu is about to turn thirty. While her friends marry and start new lives, she works full-time at a lighting company and sees her boyfriend on the weekends. That all ends when she discovers he’s having an affair with one of her coworkers. Drowning herself in work until her body and mind begin to fail her, Yaeun struggles to keep her head above the raging waters of romance, personal happiness, and life after thirty.