A group of researchers ventures deep beneath the streets of Paris into the citys catacombs, searching for a hidden artifact tied to ancient alchemy. The tunnels quickly become a claustrophobic maze, and what starts as an exploration turns into a fight for survival. As they move deeper, the group faces strange symbols, eerie sounds, and visions that force them to confront personal guilt and trauma. The deeper they go, the more reality seems to twist, blurring the line between the physical space and their worst fears. The film builds on the idea that the real horror lies not just in the environment but in what each person carries inside. With mounting paranoia, the group struggles to find a way back to the surface before the catacombs claim them.

This movie contained 3 lost souls - about one every 31 minutes.