Age Matters follows 29-year-old Rose Choi as she tries to pick up her life after her ex-boyfriend cheated on, and then dumped her. In need of employment, she takes over her best friend's odd job to cook and deliver meals to a mysterious boss. This boss turns out to be the 23-year-old CEO of Lime, Daniel Yoon. She finds him too abrasive while he finds her too desperate, but they eventually learn to get along with each other . . . and fall for each other.