After losing her husband from a terrible accident, Yeo-ul moves to an island for her son Ichan's school HSC.

I-chan gets in an accident. Yeo-wool receives a rose bouquet and a text from an unknown sender.

Yeo-ul and Yi-chan persevere against persistent discrimination from HSC students' parents. The mysterious man appears at HSC, and Yeo-ul enlists the help of a private detective to investigate the truth.

Doyeong, who had neglected Yichan to protect herself, confesses that she knew about Yeo-ul's husband all along. Yeo-ul prepares snacks for the children, but Jiseon throws them out in the trash.

Na-yoon approaches Yeo-wool with an icy look. Ji-seon tries to drive Yeo-wool out.

Yeo-wool manages to stay at the school and steps toward the secret of her dead husband.