Season 1 of The Root premiered on October 20, 2022.

Roithongsai is an orphan girl who was adopted by Rangrong's father. Upon Rangrong's father's death, she was looked after by Rangrong. When Roithongsai discovers that Rangrong views her in a romantic way and not as a sister, she attempts to run away. However, this task seems to be quite difficult since Rangrong is always around her, watching her.