90 Days, Time to Love

A flashback to Jeju Island in 1993 is the beginning of the story between Ji-seok and Mi-yeon, two individuals destined to frequently cross paths throughout the ups and downs of their lives. Although their feelings continuously grow for one another, their familial connection challenges their ability to be together.

After Ji-seok and Mi-yeon cross paths on the street and confess their love for one another, they propose a plan to move to the United States. However, plans change as Ji-seok is confronted by his father the day before they are due to leave.

Byeong-chan has devastating news for Ji-seok, causing him to go into shock and investigate further. Although they have not had contact since their failed move to the United States, after learning his fate, Ji-seok tells Deok-gu he must see Mi-yeon once again.

While meeting for the first time in years, Ji-seok asks Mi-yeon to live with him for three months, causing both of them to reminisce about their past together. Noticing a sudden change in behavior, Tae-hun suggests Mi-yeon take time off from school, while Jeong-ran asks Ji-seok if there's another woman.

After coming back into each others' lives, Ji-seok and Mi-yeon find it difficult to connect with one another, causing Ji-seok to impatiently wait for Mi-yeon to call him. Meanwhile, Ji-seok pretends to be a client in order to meet with Tae-hun; Mi-yeon is devastated when Ji-seok tells her he is sick.

As their emotions for one another begin to resurface, Wal-suk tries to talk Mi-yeon out of committing adultery. After answering questions from Byeong-chan at the hospital, Ji-seok calls Mi-yeon, causing Jeong-ran to once again question if he is seeing someone else, despite the circumstances.

After seeing Mi-yeon and Ji-seok together, Jeong-ran questions if Ji-seok is pretending to have cancer, in order to leave her for Mi-seok. Tae-hun asks his boss for a transfer to San Francisco, claiming Mi-yeon wants to move there; while Jeong-ran calls Mi-yeon and asks to meet her.

Jeong-ran and Mi-yeon meet, while Ji-seok makes plans to move into Mi-yeon's old house. Jeong-ran asks Ji-seok's mother to move into their apartment, and Tae-hun tells Mi-yeon over dinner that he asked for a work transfer and they are moving to San Francisco.

Mi-yeon learns that Tae-hun and Ji-seok met, after finding Ji-seok's business card in Tae-hun's coat. While Ji-seok's mother moves into his apartment, Jeong-ran surprises Tae-hun at his office after learning about his recent meeting with Ji-seok. Mi-yeon and Ji-seok cross paths again outside of her apartment building.

After crossing paths outside of her apartment, Ji-seok gives Mi-yeon keys to his new apartment. The dean abruptly tells Ji-seok he should take a leave of absence from the university; Tae-hun and Jeong-ran begin to feel the consequences of Ji-seok and Mi-yeon's rekindled relationship.

Ji-seok and Mi-yeon take an overnight trip to the coastline, leaving Tae-hun and Jeong-ran wondering if they are together. As Jeong-ran calls Tae-hun to suggest they meet, Ji-seok finds himself waking up in a hospital room with Byeong-chan after losing consciousness while waiting for a tow truck with Mi-yeon.

Granting his daughter's Christmas wish, Ji-seok takes Hye-jin on a date to a musical and expensive restaurant, where they cross paths with Tae-hun. After suffering from severe pain in the restaurant, Jeong-ran decides to take Ji-seok to Jeju Island; Mi-yeon decides to visit her home in Jeju as well, after her relationship with Tae-hun continues to fall apart.

Mi-yeon tries to explain to Tae-hun how much Ji-seok means to her, but Tae-hun does not understand and returns to Seoul alone, where he is asked to submit his resignation. As Byeong-chan reveals to Ji-Seok's mother that he will die soon, Ji-Seok reminisces on his life and struggles with his fate.

After collapsing at the airport, Ji-seok is taken to the hospital; Tae-hun convinces Jeong-ran to let Mi-yeon see Ji-seok, but tells Mi-yeon she must return to him after Ji-seok dies. Ji-seok decides to live in a hospice until his death, choosing to not see Mi-yeon anymore.

Although Ji-seok refuses to take Mi-yeon's phone calls, Mi-yeon visits him after being asked by his mother to do so. Tae-hun finds it difficult to focus on his work, while Mi-yeon, Ji-seok, Deok-gu, and Byeong-chan spend time together like they used to do when they were kids.

Jeong-ran and Tae-hun surprise Mi-yeon and Ji-seok by showing up at the hospice, and taking Ji-seok home; Jeong-ran is hurt when she finds out Ji-seok's mother asked Mi-yeon to visit. After being admitted to the hospital and regaining consciousness, Ji-seok confesses his love for Mi-yeon and asks for one last wish.