Se-Young (Choi Jin-sil) is a devoted wife and mother who greatly values her family and home life. She loves her doctor husband Geon-woo (Lee Jae-Ryong) very deeply, and affectionately takes care of her old mother-in-law who is afflicted with dementia, as well as her daughter whom she did not give birth to. But unbeknownst to her, for the past six years Geon-woo has been having an affair with his first love, Seo-Kyung (Sung Hyun-ah), who herself is married to Tae-Hyun (Jeon No-min). Things come to a head when Geon-woo and Seo-Kyung take their families to Saipan for an international medical seminar. Se-Young and Tae-Hyun are looking forward to a second honeymoon with their respective spouses, not knowing that Geon-woo and Seo-Kyung are secretly meeting for trysts. When Se-Young discovers her husband's infidelity, her world goes to pieces.—Wikipedia