With the General's rebuilders at the Iron Tower after Marty Ally and Buttons the unlikely trio flees to Crystal City. However they must first get through the desert without getting caught now that an enormous reward is being offered for their capture.

Marty and Ally are now back on their quest but both learn that they can not escape the inevitable. Ally is finally taken into custody. After the attack Gaff appears and Marty starts to learn about the mysterious history of his family.

While Marty fights to survive against his second opponent Ally and Buttons try to escape from the Orange Mama's cell but their plans are foiled when Jenny convinces Orange Mama to let them have a play date with her. Will this play date turn out to be Buttons and Ally's chance to escape or will they never get out?

Marty finally masters the power of the Fist and has gained the right to receive the chi that Master Zhang has been holding for him after 100 years. He is now ready to face the darkness of evil.

When Marty's father sees the Fist of Eon he realizes that the time has come for the General to make his return. Meanwhile Marty must learn to use his newfound powers to save Ally who is under attack by her father's henchmen.

Marty's father warns him not to go out into the forbidden area to search for scrap parts something he continually does. However this forbidden pleasure trip turns into a great adventure when he runs into Ally the daughter of the head of a great technological corporation and discovers a plot by the same corporation to bring back the General.

Marty finally defeats Eiger and is ready to return when he senses Shadow fighting. He leaves to help leaving Buttons to get to CDF headquarters with the Bullybots. Meanwhile Kahn is starting to question the General's orders and takes matters into his own hands.

Marty heads into the Iron Tower to face off against the General but he runs into the Four Invincible Lords. Meanwhile Ally has finally found a way to get into the Gigantor and stop Dr. Chen. But can the CDF forces and the volunteers of Orange Valley hold off long enough for Ally to make her move? And can Gaff and Shadow provide enough time for Marty to make it to the General?

Marty finally arrives just in the nick of time to save the injured Kahn and fights his way through the General's forces to the Tower entrance and at the same time Ally has finally discovered a way to stop the Gigantor and leaves for the battlefield. In Orange Valley Orange Mama is readying her people for battle against the Gigantor but will their support be enough to hold off the Gigantor?

Marty is unconscious and everyone is hoping for his recovery especially Ally. Marty's mind gets taken over by the Fist and is now out of control and this forces Chief Gibson to take drastic measures to stop him but is it enough to free Marty from the Fist's control?