What is The Walking Dead?

Rick Grimes loses consciousness. When he comes to, he is lying in an empty hospital. Well, it wasn't quite that deserted after all. He sees them for the first time in the hallway: zombies! He escapes from the hospital and realizes that an apocalypse has broken out. There are very few other survivors. They are looking for a place to stay. Eventually, they convert a prison into their home. But the zombies aren't the only problem. Since there is no longer a government, there are no longer any laws. Therefore, in desperation, many of the survivors chose the path of tyranny.