The series is co-directed by Kim Jee-woon and Park Bo-ram,[4][5][6] with the screenplay adapted from the novel by novelist and scriptwriter Joo Won-gyu.
She eventually meets N, a mysterious hacker whom she hires to uncover the truth about the incident surrounding her sister's passing.
[1][23] The initial casting announcement for the series took place on March 16, 2023, with Kim Seon-ho being offered the lead roles.
Saram Entertainment, Park Gyu-young's agency, stated that while the casting is not confirmed, they have received an offer and are reviewing it positively.
[19] In December, while attending the 8th Asia Artist Awards in Bulacan, Philippines, Kim Seon-ho mentioned that the drama was slated to be his project for 2024.