Byun Ji Sook (Soo Ae) receives a birthday gift that Seo Eun Ha (Soo Ae) sent for herself one year ago. Eun Ha made a promise that she will wear a white dress if she wants to throw in her lot with Min Seok Hoon (Yeon Jung Hoon). Ji Sook found a key in the present box that goes to the dead woman's villa and sees Seok Hoon's portrait and a secret box contained pictures of Seok Hoon and Eun Ha and her diary.
Ji Sook, who realized that Eun Ha had carried on an affair with Seok Hoon, visits Choi Min Woo (Ju Ji Hoon) and resolves to stand by her man all the time.
Meanwhile, Min Woo is devastated by the news that the family doctor is brought into custody. He, who doesn't take medicine anymore, recalls Choi Mi Yeon (Yoo In Young) was standing with Eun Ha that very day when the accident happened.
Mi Yeon gives her husband the watch back saying she will believe in his lies for their baby after a positive pregnancy test confirmed her intuitive feelings. She goes shopping to celebrate the pregnancy and bumps into Ji Sook's ex-coworkers. Mi Yeon sees the former salesperson's resume by chance in their papers scattered on the floor and visits her family's snack bar.
Byun Ji Hyuk (Hoya) tells his sister about Mi Yeon questioned him closely about his dead sister and Ji Sook lets her mother have a superb level of care.
Ji Sook attends her birthday party wearing a red dress and Min Woo looks affectionately at his wife singing "Happy Birthday" to her. As Ji Sook is asked to play the piano, Seok Hoon becomes suddenly tense but her amazing performance moves everyone.
Ji Sook tells Seok Hoon in a low whisper drinking wine all at once, "It won't go as you planned because this is Seo Eun Ha's decision."
After the party, Min Woo gives a small flower pot for her birthday present and Ji Sook is greatly pleased with the beautiful flower, "You are the best gift for me."
Min Woo is almost jumping up and down in joy over the unexpected answer and gives her a new wedding ring. Ji Sook cannot conceal her joy.
Seok Hoon found baby clothes in his wife's shopping bag looks back and forth at Eun Ha's necklace and the baby clothes with an expression of mixed feelings and goes out of the room. Mi Yeon follows her husband and sees him lay the necklace in front of Ji Sook's urn dropping tears in a charnel house.
Mi Yeon recalls the day when Seo Eun Ha slipped and fell into the pool. She lets a maid drug Eun Ha's wine and didn't rescue her although she witnessed the accident when her brother lost his consciousness due to the drug and deleted a CCTV image of her.
"Did I kill her?" Mi Yeon talks to herself shedding tears.
