Leaning on each other through thick and thin, a trio of best friends stand together as they experience life, love and loss on the brink of turning 40.
Thirty-Nine (Season 1)

Thirty, Nine (Episode 1) 8.0
Writer: Yu Young-ah
Air date: 2022-02-16
Runtime: 78 min
Overview: Cha Mi-jo announces her sabbatical to her two best friends. Chance encounters and sweet-scented peonies draw Kim Seon-u and Mi-jo together.

One Absurd Day (Episode 2) 9.0
Writer: Yu Young-ah
Air date: 2022-02-17
Runtime: 78 min
Overview: Unable to let her go, Kim Jin-seok asks Jeong Chan-young to rethink their breakup. Mi-jo receives a heart-racing confession... and heartbreaking news.

Something I Had Never Thought Of (Episode 3) 10.0
Writer: Yu Young-ah
Air date: 2022-02-23
Runtime: 73 min
Overview: Jin-seok's wife confronts Chan-young. Lacking the courage to tell Chan-young the diagnosis, Mi-jo takes her anger out on someone else.

Choice (Episode 4) 10.0
Writer: Yu Young-ah
Air date: 2022-02-24
Runtime: 73 min
Overview: Chan-young and Jin-seok tearfully reveal their secrets to each other. A friend's sighting of Kim So-won at an unlikely place rattles Seon-u.

Rachmaninoff Piano Concerto No. 2 (Episode 5) 10.0
Writer: Yu Young-ah
Air date: 2022-03-02
Runtime: 69 min
Overview: Chan-young creates a bucket list of her to-do items for loved ones. Mi-jo consoles a guilt-ridden Seon-u, who blames himself for So-won's sorrows.

Conviction (Episode 6) 10.0
Writer: Yu Young-ah
Air date: 2022-03-03
Runtime: 68 min
Overview: At an impromptu dinner for four, Seon-u's dad shows his affinity for Mi-jo and aversion for So-won. Chan-young's mom stops by while Jin-seok is over.

The Inconvenient Truth (Episode 7) 10.0
Writer: Yu Young-ah
Air date: 2022-03-16
Runtime: 71 min
Overview: Chan-young finds information on Mi-jo's birth mother and auditions to achieve a long-awaited dream. So-won moves into the orphanage.

When You Think It's the End (Episode 8) 10.0
Writer: Yu Young-ah
Air date: 2022-03-17
Runtime: 74 min
Overview: Seon-u asks his father to apologize to So-won. Chan-young's mom demands answers from the trio. Mi-jo learns of her biological mother.

A Thousand Nights Over and Over Again (Episode 9) 10.0
Writer: Yu Young-ah
Air date: 2022-03-23
Runtime: 77 min
Overview: Mi-jo's conversation with her birth mother leaves her distraught. Chan-young excitedly plans her mom's birthday, but nearly misses the celebration.

He Who Dances Must Pay the Piper (Episode 10) 10.0
Writer: Yu Young-ah
Air date: 2022-03-24
Runtime: 67 min
Overview: When a strange man comes looking for Mi-jo at her clinic, she seeks answers from her adoptive mother. Jang Joo-hee expresses her frustration and fear.

About Romance (Episode 11)
Writer: Yu Young-ah
Air date: 2022-03-30
Runtime: 76 min
Overview: Joo-hee and Mi-jo take Chan-young out to capture her smile after hearing she's taken her funeral photo. Mi-jo's parents invite Seon-u over for a meal.

Samseong-dong, Hyochang-dong and Gocheok-dong (Episode 12) 10.0
Writer: Yu Young-ah
Air date: 2022-03-31
Runtime: 69 min
Overview: Chan-young gets the chance to say goodbye to loved ones at an unforgettable brunch. Worried about Mi-jo, she leaves behind a surprise gift.

Seasons

Episodes 12