Episode One

Lee Yeon Jae is woken up mid-medical procedure. Yeon Jae relates the results of her routine physical to her co-worker and longtime friend, Hye Won, as they sit out the events of company sports day. They're both lower-level employees at Line Tours, both from similarly humble backgrounds, and both single and nearing that dreaded designation of old maid.

Episode Two

Yeon Jae throws her resignation in her boss's face. As she tells him that she quits and swears at him, the entire office gasps in awe. Her boss tells her that he'll blackball her in the industry forever. She laughs bitterly, and tells her that to her, forever isn't much longer. And with that she turns to gather up her things.

Episode Three

After a misunderstanding Yeon Jae becomes Ji Wook's tour guide for the day and the two have a great time together. They spend the night at the country side and come back to the hotel to find Sae Kyung waiting for them...

Episode Four

With severe stomach pains Yeon Jae ends up it the hospital with Ji Wook's help. When he tries stay by her side, she tells him to go away. Ji Wook finds himself worried about Yeon Jae and can't help but think about her.

Episode Five

Yeon Jae helps Ji Wook with a matter concerning work he follows her in to the Tango class and signs up himself. While they dance together they both become aware of their feelings for each other... Yeon Jae and Eun Suk end up going to a Fan Club meeting for Jun Su where they run into a jealous Ji Wook...

Episode Six

Yeon Jae finds herself facing a law suit from Se Kyeong and is determined to fight. Yeon Jae rescues a dog after learning that it will be killed soon and asks Eun Suk to take care of it. Eun Suk has Yeon Jae over for dinner and Yeon Jae finds her book that he has kept for all these years.

Episode Seven

Ji Wook gets Wilson to admit that he has never lost the ring at the court hearing and Se Kyeong is forced to cancel the lawsuit. Eun Suk volunteers to dance the tango at a hospital event and asks Yeon Jae for her help in learning it. Yeon Jae and Eun Suk set up a blind date for Yeon Jae's mother and run into Ji Wook who can't help but feel jealous of Eun Suk.

Episode Eight

While Yeon Jae is practicing by herself at the tango studio Ji Wook shows up and as they dance they realize how they feel about each other. After spending a day with Yeon Jae at an amusement park Ji Wook confronts Se Kyeong about calling off the engagement telling her she should be the one to do it. She refuses, telling Ji Wook he doesn't have the courage to do it himself.

Episode Nine

After Ji Wook announces is intentions of breaking off the engagement to Se Kyeong, he runs off to Yeon Jae.Yeon Jae asks him if he wants to date and he answers by hugging her. Meanwhile Se Kyeong's Father faints from the shock of the broken engagement and ends up in the hospital. When he wakes up he thinks up a plan to make Ji Wook obey his orders by putting his company in jeopardy.

Episode Ten

Yeon Jae and Ji Wook have a good time in Wando but on their way back Yeon Jae is in pain. After saying good bye to Ji Wook she calls Eun Suk for help and is rushed to the hospital where she learns that her condition has worsened. Yeon Jae and Ji Wook are having dinner together when Ji Wook's father runs in and tells them they will never be allowed to marry.

Episode Eleven

Ji Wook confronts Yeon Jae about her condition and she tells him that she wants to break up with him. He is heart broken but isn't sure if he can deal with another death of a loved one. Se Kyeong hears from Ji Wook's father that Ji Wook and Yeon Jae broke up and she calls Yeon Jae to confirm it.

Episode Twelve

After hearing from Yeon Jae again that she wants to break up with him, Ji Wook tells her he will never see her again. Yeon Jae is heart broken but feels this is for the best. Se Kyeong tries her best to have a second chance with Ji Wook. Hye Won has set a date for her wedding and Yeon Jae goes with her to pick out a wedding dress.

Episode Thirteen

Ji Wook is rushed to the hospital after the car accident. Yeon Jae is worried but is relieved to learn that the injuries are not severe. When Ji Wook wakes up he tells Yeon Jae that he cannot be happy without her and she tells him she feels the same way. Ji Wook announces to the whole company that they are dating, which makes Se Kyeong and Ji Wook's father very angry.

Episode Fourteen

Ji Wook's father visits Yeon Jae and asks her to break up with Ji Wook. Yeon Jae tells him she can't do that and tells him she will try to make him happy even after her death. Yeon Jae goes back to the hospital for another round of chemo treatments and finds Hee Joo with her mom who came to visit from the Philippines.

Episode Fifteen

Having heard from Yeon Jae about her cancer, Yeon Jae's mom is in shock. She eventually gets over the shock and realizes she has to be strong for Yeon Jae's sake. Chairman Im asks Ji Wook to leave Korea with Yeon Jae and never appear in front of Se Kyeong and Ji Wook refuses. Chairman Im is upset but Se Kyeong shows up and tells him she doesn't want Ji Wook anymore.

Episode Sixteen

Yeon Jae is happy and relieved when her mother marries teacher Kim. To finish up her bucket list, she makes a project proposal and gives it to manager Noh. Everyone loves the proposal and against the chairman's wishes Yeon Jae rejoins the company. After a successful launching of the new vacation package, Yeon Jae is rushed to the hospital with a high fever.