55:15 Never Too Late - Season 1

Jaya, Songpol, Amornthep and Jarunee transformed into their 15-year-old self. After realising the change, they go on a mission to fix the situation.

San, a 55-year-old voice actor, feeling hopeless, transformed into his 15-year-old self. Everything changes when he meets Prim, his first love.

55-year-old Songpol comes out as gay after his mom's death. He decides to confess his feelings to his first and one-sided love Mathee.

Jaya is a diva singer. When she has been transformed into her younger self, she takes this opportunity to become a superstar again.

Jarunee is a strict teacher that no student likes. After transforming into her 15-year-old self, she goes back to school to continue her work.

Amornthep is a former boxer. He was elated after seeing an announcement about a boxing competition but the participants must be below 17 years old.

After learning that there is probably no easy way to fix their problem, the five of them can only make peace with their new life.

As her fan, Songpol is begged by Jaya to help her become a singer again, but Songpol is as interestingly good-looking as Pipu, whom he has a crush on.

San becomes close with Prim's niece Kekee. Bomb becomes suspicious of Jinny, Jarunee's neighbor. Bomb gets Jinny's hair strand for a DNA test.

Prim meets San and shares her sorrow. Listening to her story, San gets so furious that Prim becomes puzzled seeing him being overly into her story.

Amornthep has been training hard and his dedication is starting to be recognized by people in the camp. San deals with his long bottled-up guilt.

Jinny, Eve, Joom, and Noinae are kidnapped for unknown reasons while they are on their way to school.

Jaya gets an audition with a record label with the help of Pao. Amornthep becomes popular after winning a boxing competition.

A problem emerges for Prim and San because they have become so close that Prim might be accused of having a relationship with a minor.

Things are heating up at the boxing camp as it's the final match between Pruek and Amornthep, their friends from school coming to support them.

In the morning, all of them are shocked, realizing that they have been transformed back into their actual age. Some are happy, while some are sad.