A spaceship passes by shortly after the destruction of Planet Namek. It's King Cold, the father of Freeza, finds the remains of Freeza's body flowing through space and quickly orders his henchmen to rescue his son. Freeza is literally rebuilt, as he becomes half robotic. Now, father and son plan to land on Earth to get revenge of what happened...
The ship lands on Earth. The Z warriors on Earth are no match for Frieza, and now they must face him in addition to King Cold... without the help of Goku, to which all believed was dead. Cold and Frieza believe in swift victory in the destruction of Earth, but a figure appears out of nowhere. Vegeta recognizes the aura of the man to be that of a Saiyan, and resents the fact that there is another stronger than him. The mysterious visitor charges up and reaches Super Saiyan mode. With a few slashes with his sword, Frieza is truly killed. Then, the figure shoots a fireball at Cold, which pierches through his heart and automatically kills him
The stranger doesn't say a word except that, he tells that Goku is not dead, but escaped to Planet Yardat when Planet Namek exploded. Then, he tells that Goku should appear in a 3 hours. The Z warriors are shocked, and Goku does appear. He really did take refuge in Yardat and learned how to teleport from its inhabitants. Then, Trunks introduces talks with Goku telling him that he has died and his mother and father are Bulma and Vegeta, and Goku doesn't believe his ears. Trunks gives Goku heart medicine and tells him he will get a strange desease and he will die of a heart attack. To make sure Trunks pulls out his sword and with one finger Goku blocks it and this proves that Goku is the chosen one, and everything that Bulma told Trunks about him is true. He told Goku that he must not tell anyone that he was here and his father and mother because it would make him never be born. Piccolo heard everything, and when Goku came over Goku realized that Piccolo knew and Piccolo told a the half story. He never said Trunks' name or Bulma and Vegeta will have him. They trained hard for three years and then...