Its plot follows a young man (Henry Golding) reviving his lost love (Beatrice Grannò) through lucid dreams, with unintended consequences.

[3] The film is a Spanish-Belgian co-production by Sayaka Producciones, Wrong Men, Señor y Señora, and Mediacrest Entertainment[6] with funding from ICAA, Wallimage, Filmin, and Movistar Plus+.

[19] Olivia Popp of Cineuropa judged that it is much more rewarding "to read the feature less as a sci-fi/romance blend than a journey of sci-fi existentialism that interrogates the nature of desire, attachment and loneliness.".

[20] Raquel Hernández Luján of HobbyConsolas gave the film 75 points ('good'), writing that Vigalondo tells a story "in which art, dream and mourning come together in a visually dazzling way, even if there are twists and turns that shake the narrative".

[21] Fausto Fernández of Fotogramas rated the film 4 out of 5 stars, declaring it "a wonderful act of love, selfish, manipulative but ultimately full of sincerity and sacrifice".