Garlic Jr.'s quest for immortality and revenge against his father drives him to collect the dragon balls, resulting in the kidnapping of Goku's son Gohan. In response, Goku, Kami, Piccolo, and Krillin join forces to rescue Gohan and prevent the world from being consumed by a dead zone.

Dragon Ball Z: The Movie - Dead Zone
A young warrior named Gohan is abducted by a formidable foe seeking a mystical Dragon Ball that guarantees immortality, prompting his heroic friend Goku and their companions to embark on a treacherous adventure to rescue Gohan and safeguard the planet.