Gohan and Oolong searching for the Dragon Balls that have all been gathered in the frozen Tsurumai-Tsuburi Mountains, a place where the ice never melts. Though he hasn't told Gohan, Oolong secretly plans on wishing for comfy underwear. Before they reach them, Shenron is summoned by Dr. Kochin, who wishes for Dr. Wheelo and their laboratory to be thawed from the ice. Later when Gohan and Oolong approach the laboratory, they are ambushed by several Bio-Men and are knocked out but Piccolo, who was training in the area, shows up and saves them. However, he is then ambushed by three mysterious warriors and the resulting attack causes the ground beneath them to give way burying Gohan and Oolong. After regaining consciousness, they return home after Gohan promises Oolong to keep their trip a secret, Meanwhile, at the Kame House, Oolong is preparing a meal for Bulma to make up for destroying the Dragon Radar when several Bio-men show up asking for Master Roshi. Refusing to go along with them they attack him, but they are easily defeated. Kochin then appears, thinking that Roshi is the strongest in the world and when the Bio-men put Bulma's life in danger, Roshi agrees to go along with them. Witnessing the entire event, Oolong goes to your house and tells him what happened. You then sets off on the Flying Nimbus toward the Tsurumai-Tsuburi Mountains to save Roshi and Bulma. At Dr. Wheelo's Fortress, Kochin tests Roshi against his Bio-Warriors Kishime, Ebifurya and Misokatsun and despite putting up a decent fight while being outnumbered he is ultimately defeated. Bulma then reveals to Wheelo and Kochin that you is in fact the world's strongest and Kochin in turn reveals their plan to have Wheelo's brilliant scientific mind take over the body of the strongest in the world where he will then be able to reign over the world as revenge for all the humans who refused to acknowledge his genius and cast him aside

Dr. Wheelo: I want to take the world strongest's body, so those humans will regret to ignore my intelligent!