Lee Su-jin's joyless marriage to Kwon Do-hun -- with whom she was once deeply in love -- reaches a breaking point when he refuses to have a baby.

While Do-hun hides secrets from Su-jin, she considers an unorthodox idea to try and force him into a speedy divorce.

Brian Jeong and Son Ye-rim cook up a scenario for Su-jin's divorce project, and Do-hun spends time with his mother-in-law.

Moving her plan forward, Su-jin gets Do-hun to agree on a fishing trip with her. Brian stands up Ye-rim for dinner.

With his symptoms accelerating, Do-hun knows he must give Su-jin what she wants -- or risk her finding out about his illness.

Forgetting he needs to stay away, Do-hun heads to Kwon A-ram's kindergarten. Mun Kyeong-hun carves out a place in Su-jin's life.

Su-jin worries that Do-hun has reappeared to take A-ram away from her. Meanwhile, Brian and Ye-rim come across each other on a film set.

For the first time in years, Do-hun and Su-jin come face-to-face. Choe Hang-seo and Baek Su-a throw a wedding celebration. Brian meets Ye-rim's fiancé.

Do-hun's proposal for launching a sugar-free chocolate bar falls through. Su-jin locks herself away in her apartment, worrying her friends.

Jo Mi-kyeong and her mother disapprove, but Su-jin decides she wants to be by Do-hun's side -- and brings A-ram to him.

Do-hun remembers how he fell in love with Su-jin, who packs up his bags to take him back to the house. Ye-rim makes her choice about Brian.

Losing more of himself each day, Do-hun works on creating good memories with A-ram, and Brian offers to film a video to preserve them.

When Do-hun's condition reaches new lows, Su-jin recounts their story to him. The patent for his chocolate bar is found to have been stolen.

Su-jin plays along with Do-hun, who thinks he is in his 20s -- but runs into trouble when he gets jealous of Kyeong-hun.

Do-hun's Alzheimer's disease progresses, erasing even Hang-seo. A-ram wonders why they can't play together -- and Su-jin must explain why.

To A-ram's delight, Do-hun attends her kindergarten event, and the family goes on its first vacation. The chocolate bar relaunches under a new name.

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We don't have an overview translated in English. Help us expand our database by adding one.

We don't have an overview translated in English. Help us expand our database by adding one.

We don't have an overview translated in English. Help us expand our database by adding one.

We don't have an overview translated in English. Help us expand our database by adding one.

We don't have an overview translated in English. Help us expand our database by adding one.

We don't have an overview translated in English. Help us expand our database by adding one.