Kang Ji-won is married to Park Min-hwan. She married him out of love, after years of dating, but it wasn’t a happy marriage. Her husband quit his job and her mother-in-law was demanding; she’s the breadwinner of the house. One unfortunate day, she finds out that she has cancer, and if she gets lucky, about a year to live. To make things worse, she finds out that Min-hwan is cheating on her with her best friend or “other half” Jung Soo-min. She gets into a physical confrontation with the two, resulting in her death. However, she wakes up and finds herself 10 years in the past. After having a breakdown, she snaps out of it and accepts that this is her new reality; that whatever happened to her wasn’t a mere dream.