Paris is on the verge of disaster. The Seine overflows its banks. People begin to disappear. The capital of France is in danger of destruction, but the townspeople suspect nothing. Only one person, Sorbonne professor Sylvain, understands the seriousness of what is happening. Trinite, an accidental witness to one of the abductions, helps him find the answer. Together with his assistant, Sylvain goes to the very heart of Paris - its catacombs. They have twenty-four hours to save the city. The Latin Quarter, the Champ de Mars, Montmartre and... The Botanical Garden, Jardin des Plantes, with its greenhouses and enclosures for exotic animals... The sights of Paris became the backdrop for the new dizzying thriller by Nicolas D'Etienne D' Orva.