Watch the full plot of "Death Stranding". In the future world, human technology has made a major breakthrough. The scientific community has developed a "dimensional space perception system" using the concept of "baby perception". The "baby sensory perspective theory" that was once not recognized by the scientific community has finally become a reality due to the continuous evolution of technology. This is an extension of the success of the "in vitro synthetic baby" technology. At first, humans could only detect substances from the subspace through sonar signals from sensors. With the deepening of technology, scientists continued to expand by creating "micronuclear explosions" to distort space, thus opening a channel to the parallel space of the earth. They were surprised to find that the ecological environment in this parallel space with the human world was similar to that of the real earth. Human forces have formed a special team around the world. Sam, a former marine, is also one of the employees of this team. In order to avoid those alien creatures as much as possible, the captain of the search team wears a wearable "baby perception container". When the team members connect the container to the equipment on their bodies, they will activate the "subspace object searchlight" carried on their backs, and locate the action positions of those alien creatures through automatic tracking. Society has suffered some kind of destruction due to the invasion of parallel worlds, and many humans have become puppet BTs, unable to die completely and invisible to normal people. This is called Death Stranding. The superpower United States is falling apart, people build high walls, and the American City Federation appears. The protagonist Sam, as a member of the corpse disposal team 6, unites the human world and saves the people in the other space.