In his lab, biotech expert Dr. Kochin collects the dragon balls to free his master, Dr. Uirou-a deranged scientist bent on world domination-who remains trapped in the unmelting ice of the Tsurumai-Tsuburi Mountains. Gohan Son and Oolong arrive searching for the dragon balls but are ambushed by bio-engineered creatures called "Bio-Men." Nearby, Piccolo tries to intervene but is confronted by three unknown warriors. A sudden collapse of the ice beneath them interrupts the fight, leaving Gohan and Oolong buried. After waking up, they return to Kame House only to find more Bio-Men, who demand Muten-Roushi come with them. He refuses and effortlessly defeats them, drawing Dr. Kochin’s attention. Believing Muten-Roushi is the world’s strongest man, Kochin kidnaps Bulma to force his cooperation in his shadowy scheme involving his master. Who are Dr. Kochin and Dr. Uirou? What do they really want?

Dragon Ball Z: The World's Strongest
In his lab, biotech expert Dr. Kochin collects the dragon balls to free his master, Dr. Uirou-a deranged scientist bent on world domination-who remains trapped in the unmelting ice of the Tsurumai-Tsuburi Mountains. Gohan Son and Oolong arrive searching for the dragon balls but are ambushed by bio-engineered creatures called "Bio-Men." Nearby, Piccolo tries to intervene but is confronted by three unknown warriors. A sudden collapse of the ice beneath them interrupts the fight, leaving Gohan and Oolong buried. After waking up, they return to Kame House only to find more Bio-Men, who demand Muten-Roushi come with them. He refuses and effortlessly defeats them, drawing Dr. Kochin’s attention. Believing Muten-Roushi is the world’s strongest man, Kochin kidnaps Bulma to force his cooperation in his shadowy scheme involving his master. Who are Dr. Kochin and Dr. Uirou? What do they really want?
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