Our paper looks at a catastrophic narrative (B. Sansal, Vivre. Le compte à rebours, 2024), which declared religion obsolete in a completely disenchanted world, and established science as the guarantor of humanity’s future.After 2084. La fin du monde (2015) and Abraham ou la cinquième Alliance (2020), Sansal once again reinvests the theme of prophecy and religious belief in the contemporary world against a background of dystopian anticipation of the catastrophe.Vivre. Le compte à rebours (2024) features Paolo, a French university professor who has received a revelation that the earth will disappear within 780 days. Armed with this belief, he claims to be the first or at least one of the “Appelés” tasked with warning and convincing elected representatives to follow him in a fanciful project: to embark on an alien spacecraft to change Planet or Galaxy before the final deadline. This approach is reminiscent of the biblical myth of the flood that Boualem Sansal is updating by combining the cosmic catastrophe with the computer and technological drifts and obsessions of the contemporary world.First, our paper analyzes this narrative of the impending disaster and looks at the narrative and semiotic mechanisms underlying the construction of the disaster. Next, it analyzes and demonstrates the difficulty/impossibility of saying the apocalyptic concern because according to the author “saying things well makes them dangerous”. Finally, it analyzes the manifestations of a new doctrine (New Prophets, New Revelation, New Belief) as denunciation of totalitarianism and more particularly of religion's hold on the spirits.