Cattacumbae Perdittas

You are a retired police veteran in France, one night while you were sleeping your loved one whose disappearance you spent years investigating contacts you in your dreams, screaming for help and for you to find it in the depths of the tunnels of Paris, You cannot ask your old team for help, because they believe that you are just a person damaged by time and circumstances, one day you decide to go down to put an end to these terrible nightmares that torment you every night, armed with your old lucky revolver that A flashlight and a GoPro have helped you so much in your life, without knowing that this could have been the mistake that doomed humanity.