The Hulks face their biggest foe yet when they travel into space to battle Ego the Living Planet, who threatens to tear Earth apart! To survive, they have to tackle the second biggest ego in the galaxy -- Red Hulk's.

A-Bomb's birthday calls for a celebratory game of mini-golf, but thanks to the Leader, it's the Hulks who are miniaturized. Now the one-inch heroes must stop the towering Leader from shrinking every city on Earth.