Asimov's story has an open ending, although the author suggests an apocalyptic outcome. As the story unfolds, the connection between religious deception and natural and historical contingencies is explored. This is the aspect that the band Opsis has focused on, reinterpreting Nightfall in their own way, starting from an experimental and progressive approach with psychedelic veins. The music of the project restores the science-fiction atmospheres of Asimov's writing through a proposal devoted to digression and lengthened tempos on purely heavy rock rhythms, which however do not scorn heterogeneous solutions coming from other musical horizons (especially jazz) in the arrangement phase.

End of Light creates a parallel story to “Nightfall”, set at the same chronological moment. The chorus is based on the perspective of the people of Lagash, who are seeking clear answers to a picture with blurred contours that are difficult to decipher. They will find this answer not in the madness prophesized by the sectarians and predicted by the scientists, but in a new consciousness at the mass level, in which fire takes on a different meaning: from a sign of death to a symbol of purification and renewal.