Dragon Ball Z: Dead Zone

Piccolo is training alone on a desolate cliff when a group of unknown foes ambushes and overpowers him. These same attackers then head to Mount Paozu to steal Gohan Son’s "Dragon Ball." When they arrive, they quickly defeat Gokuu Son’s wife and father-in-law-Chi-Chi and Gyumao-and take Gohan captive. Sensing something is wrong, Gokuu hurries back home, where he finds Chi-Chi injured on the ground. She tells him what happened. Determined to rescue his son, Gokuu goes to Kame House to borrow the Dragon Radar, hoping to track down the Dragon Balls-and with them, the enemies who took Gohan.