In the distant future, Dr. Sugar Brown: a renowned famous scientist is determined to figure out who the strongest fighter of history is and has gone to great lengths in order to finally gain the answer to his own question. Through the use of a time machine that he had built, Dr. Brown has brought together eight fighters from the distant past (each of whom are based on actual historical figures) so that all of them can compete and take part in a fighting tournament that Dr. Brown has organized; the tournament itself being used as a way to determine who the strongest fighter of history is. Little does Dr. Brown and the participating fighters know and realize that an unknown threat is secretly watching them during the progression of the tournament and that this unknown threat could easily endanger them and the rest of the world.