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Tired of repeating the same task (cell division) day after day, the Normal Cell laments while working his boring job, when a mysterious cell wearing a charming hat suddenly appears in front of him. This cell proceeds to invite the Normal Cell to spread mischief and play pranks on the White Blood Cells (Neutrophils) and Killer T Cells. Though the Normal Cell enjoys being able to blow off some steam from his day to day life, who is this charming hat wearing cell?
Goku and the entire gang are on their way to Bulma's house in West City to celebrate her birthday. Along the way Goku learns learns about safe street-crossing rules from a little girl he meets. Krillin and Master Roshi also witness an event that illustrates why children shouldn't run into the street carelessly.