A drama that unfolds the adventurous life of Ae-soon, the "remarkable rebel," born in Jeju in the 1950s, and Gwan-sik, the "unyielding iron," full of challenges and trials throughout the four seasons.

[2] The series was developed under the working title Life (Korean: 인생; RR: Insaeng) directed by Kim Won-seok[18] and written by Lim Sang-choon marking her return after writing the 2019 KBS drama When the Camellia Blooms.

Among the actors in attendance were IU, Park Bo-gum, Lee Jun-young, Choi Dae-hoon, Na Moon-hee, and Kim Yong-rim.

[18] On January 30, 2023, Moon So-ri and Park Hae-joon were officially confirmed to play the older versions of Ae-soon and Gwan-sik, respectively.

This marks the fourth collaboration between Park Hae-joon and director Kim Won-seok, following their successful partnerships on tvN dramas like Misaeng: Incomplete Life, My Mister, and Arthdal Chronicles.

[9] Finally, on March 15, 2023, Lee Jun-young's casting was confirmed, and he actively participated in the script reading, securing a lead role in the drama.

[29] In December of the same year, while attending the 8th Asia Artist Awards in Bulacan, Philippines, Kim Seon-ho mentioned that the drama is slated to be his project for 2024.

[35][31] On January 30, 2024, media outlets shared the script reading photos of the drama and confirm its exclusive release on Netflix worldwide.