Sci-Fi martial arts action! 
After years of training and adventure, Goku has become Earth's ultimate warrior. And his son, Gohan, shows even greater promise. But the stakes are increasing as even deadlier enemies threaten the planet. DRAGON BALL Z is the ultimate science fiction-martial arts manga. 
With an entire planet for their battleground, Goku and Freeza continue their showdown to see who's strongest in the universe! But Goku's determination turns to horror as he realizes that his enemy has just been toying with him...and at just 50% of his full power, Freeza is more than strong enough to beat Goku! Gohan, Piccolo and Kuririn distract Freeza while Goku powers up for a gigantic genki-dama--the last-ditch "energy sphere" technique. Soon, the heroes have no choice but to hope for a miracle...