[5] Dae-ho is a young investigative journalist and single father who has made a few enemies by exposing several corrupt politicians and businessmen.

Filming concluded on June 29, 2015 in front of Namhae Catholic Church in Gyeongju, Gyeongsangbuk Province, South Korea.

However, it was widely reported that the film was delayed due to the sexual assault and rape allegations that surfaced in June 2016 against actor and K-pop star Park Yoo-chun.

"[6] However, Kim Joon-sung denied this, stating, "It took longer than expected to complete the film because it has lots of computer graphics, which delayed the release.

[3] Prior to the film's theatrical release, the American entertainment company Netflix acquired the rights to distribute Lucid Dream worldwide.

[2] Critic Min-Ji Jin of Korea JoongAng Daily wrote that, "Despite the original subject and star-studded cast, the science fiction thriller 'Lucid Dream'...fails to make full use of either."

[4] In a review for the Yonhap News Agency titled "Unsalvageable mediocrity," critic Sun-ah Shim wrote, "At face value...it could have been an engaging film, replete with drama, action and paternal love.

Shim thought, "The film crumbles mainly because of its wholly predictable and loose plot," adding that it, "recycles parts of dramatic devices from Hollywood blockbuster 'Inception'."