In a high school in Chuncheon, a rebellious, disobedient student named Seo Kang-wook meets a young and naive teacher Lee Yeol-joo, and despite everything, they fall in love.

Initially, Yeol-joo paid a lot of attention to Kang-wook, recognizing his inherent intelligence and talent and hoping to steer him to the good path.

Yeol-joo herself was in an apparently steady relationship with a promising police inspector, Kim Tae-hyun, who cares for her a whole lot more than she does in return.

To protect her, Kang-wook takes the blame and goes to jail, but not before convincing Yeol-joo that her memory of killing the man was just an episode of narcoleptic hallucination.

The circumstances hamper Yeol-joo from loving Kang-wook, but she is desperate to help him recover the lost five years and become a top-notch cook.