Every student disappeared after writing their exam to collage. In the world they appear to.no one knows what await them as they all started making friends with different schools. jack is a really good guy but who has a bad intention,motive and he was unpredictable to read.He always hope that someday they will be a world where they won't be such things as parent or siblings. Because of what happened to his family. His plan is to avenge his family. But how is he gonna do that when he didn't even see the appearance of the person that kill is family. In the world they landed to called WORLD IN A WORLD. jack hope yo see the murder that kill all his families including his friends. But he didn't know that they are a lot of betrayal that's await him.