While meditating beside a waterfall, Piccolo is approached by Gohan and Icarus, with Gohan showing Piccolo a tune he has just learned to whistle. To his shock, Piccolo finds the noise excruciatingly painful due to his enhanced Namekian hearing, and angrily orders Gohan to stop. Meanwhile, at the Capsule Corporation compound, Bulma and her father discover that a meteor is heading toward the Earth and will most likely destroy the planet upon impact. Amidst mass panic throughout the Earth, Goku and Krillin rush to intercept the meteor, blasting it with Kamehameha waves, but fail to damage it. The meteor, however, does not hit Earth, instead passing it and exploding in orbit. When the dust clears, a strange building is present on the Earth.
An army of armored soldiers comes out of the building and declares the Earth to be under the rule of their leader, Lord Slug, and terrorize the citizens for laughing at them. Gohan and Chi-Chi appear and fight the soldiers, whose eyes appear to be hypersensitive to the sunlight, but Chi-Chi is easily subdued and Gohan loses his hat with the four-star Dragon Ball as Slug himself appears and takes it. Bulma appears and defies Slug's henchmen, who reveal their intentions to Terra-freeze the Earth and turn it into their own star cruiser. Slug reads Bulma's mind and learns about the Dragon Radar, and orders his men to find the remaining six Dragon Balls in one hour.
Slug's men eventually bring the Dragon Balls back to base and summon the Eternal Dragon, Shenron. The elderly Slug wishes for eternal youth, which is granted, and he launches a pod into space, where it summons dark clouds to cover the sky, blocking out the sunlight, modifying the atmosphere to accommodate Slug and his men, while proving deadly for the human race. Goku, still exhausted from his ordeal with the meteor, is found unconscious by Yajirobe, who gives him a Senzu Bean.
At Slug's base, Gohan resumes his assault against Slug's army and manages to bring down scores of them until he is subdued. Piccolo appears and rescues Gohan from death. Slug's top men, Angila, Medamatcha and Wings appear and engage them in battle. Piccolo kills Wings while Medamatcha smothers Gohan into unconsciousness, but as Medamatcha moves in to finish Gohan, Piccolo throws himself in front of Gohan and takes the blast. They are almost killed, but Goku and Krillin arrive on the scene in time and kill Angila and Medamatcha, but Slug then enters the fray.
Slug blasts Krillin aside and fights Goku one on one, easily taking the upper hand despite Goku's efforts. However, as Slug moves in to finish Goku, Goku is overcome by rage at the damage done to the Earth and its inhabitants, and transforms into a False Super Saiyan (the midpoint between Goku's base form and Super Saiyan form). With his power boosted, Goku easily takes control of the battle and pummels Slug, breaking his arm in the process. To Goku's horror, however, Slug tears his damaged arm off and regenerates it, also removing his helmet and revealing that he is actually a Namekian. As Slug transforms into a giant, King Kai telepathically contacts Goku and tells him that Slug is the last Super Namek, a branch of Namekians who grew obsessed with power and were banished from Planet Namek by use of the Dragon Balls.
Goku and Slug continue their fight, but with Slug's increased strength and Goku's superior speed, neither can best the other. Slug eventually grabs Goku and starts to crush him, but Piccolo, knowing his own weaknesses, intervenes and pulls on Slug's antennae. Slug grabs Piccolo in his hands, but Piccolo, remembering his sensitive hearing, pulls his own ears off and screams for Gohan to start whistling. The noise deafens Slug, especially in his giant form, leaving Piccolo to transfer his remaining energy to Goku. Goku powers up and manages to fly straight through Slug's stomach, knocking him out. Goku then flies into the sky and begins preparing a Spirit Bomb in order to destroy the Terra-freezing pod, but Slug gives chase. In desperation, Goku fires the Spirit Bomb at Slug, hitting him and sending him directly into the Terra-freezing pod which explodes, destroying Slug and removing the dark clouds from Earth's atmosphere.
In the aftermath, Yajirobe appears and provides everyone with Senzu Beans. At Kame House, Master Roshi, who slept through all the events, wakes up and wishes for something exciting to happen.
Lord Slug
Lord Slug (スラッグ Suraggu?), sometimes known as just "Slug", is a Namekian and the villain of the movie Lord Slug. Slug was born and lived on the original Planet Namek sometime prior to the climate change that wiped out almost all Namekians. Slug, along with other Namekians, discovered the key to unlocking a higher consciousness within. They were known as Super Nameks, but they soon became intoxicated by their new power and began to misuse it, behaving much like the Saiyans. He formed a demon-like army on Namek, and approaches Earth in his eponymous movie. He attacks Goku, but is fooled by the "False Super Saiyan" technique. Lord Slug rips off his broken arm and regenerates, transforming into a Great Namek. Using Kaio-Ken, Lord Slug is seemingly killed by a gaping hole in his chest, but starts to pursue Goku. However, Slug met his demise soon after as Goku kills him with a Spirit Bomb. Lord Slug appeared again in the OVA, Plan to Eradicate the Saiyans, as well as in Plan to Eradicate the Super Saiyans (the remake of Plan to Eradicate the Saiyans featured in Dragon Ball: Raging Blast 2), where he was revived as a Ghost Warrior alongside Turles, Frieza, and Cooler. In the original version, Slug could not die unless he was killed the same way he was before, which resulted in Gohan whistling once again, which cripples Slug with pain and Piccolo finishes him off with a large energy blast. In the remake, he couldn't be killed unless the Destron Gas Machine was destroyed.
