Leo is a Spaniard working as a metro driver in Brussels.
He is witness to the death of an individual who jumped in front of a train, whom Leo identifies with his son Hugo.
A joint co-production among companies from France, Belgium and Spain, the film was produced by Frakas Productions alongside Noodles Productions, Eyeworks and Fasten Films,[4][1] with the participation of RTVE, Movistar Plus+ and support from ICEC and Eurimages.
[1][4] Olivier Delcroix [fr] of Le Figaro wrote that Gederlini "signs an implacable thriller with the excellent Antonio de la Torre".
[6] Raquel Hernández Luján of HobbyConsolas scored 75 out of 100 points ("good"), highlighting the performances, the cinematography, the soundtrack and the handling of the narrative tension as the best things about the film, whereas citing that the film "leaves a lot open to the viewer's interpretation" (with the finale requiring more explanation and development) as the worst feature about it.