The game starts with a Ninja in training (simply named Ninja), who comes to rescue his Sensei (simply named Sensei) from the Ranx sent by Ninja’s nemesis, Emperor O-Dor. Ninja saves Sensei by defeating the Ranx. Then, a creature comes to attack Ninja which he deals with easily. The creature then spits out a Rage Stone which Ninja touches and goes into a fit of rage and accidentally kills Sensei. Sensei comes back as a ghost and tells Ninja that there are more Rage Stones and with their power, he can defeat O-Dor. Sensei then sends Ninja to find the second Rage Stone in Robot Beach. Ninja then arrives at Robot Beach.