Are you ready for a fierce battle in an ultra-deathmatch!? Who is the greatest hero in the world? You will find out today! A scientist has created a time machine that eight heroes will travel through time with to prove who is the greatest fighter of all time!

In the distant future, Dr. Sugar Brown: a well-renowned and famous scientist is determined to figure out who the strongest fighter in history is and has gone to great lengths to gain the answer to his question. Through the use of a time machine he built, Dr. Brown brought together, from among the centuries, several legendary warriors. Each combatant competes in a one-on-one fighting/death-match tournament that Dr. Brown has organized. The tournament is used as a way to determine who the strongest fighter in history is. Little does Dr. Brown, or the participating fighters realize that an unknown threat is secretly watching them during the tournament and that this adversary could readily endanger them and the rest of the world.