It was the first time you went down to such depths, you were in a submarine with 4 other people, among them the driver who went down to the depths of the Mariana trenches, told everything that had been found in that place under the dark waters. , you had heard many stories but your mind was interrupted by a soft knock next to your small window, you turned your gaze and... Was it some kind of half-shark human? who was staring at you as you swam by the submarine