BIOGRAPHY OF DRAGON BALL Z
After Goku marries Chichi, they have a son called Son Gohan. Years later, Goku's brother came from the planet Vegita, he threatens to destroy Earth, but Goku sacrifices himself to kill him and save Gohan. After the death of Goku, Piccolo takes care of Gohan and helps him train and become as strong as it was his father. Moreover, Goku is training in the sky. Many other characters are appearing and several confrontations occur, new friends and powerful enemies appear and Goku will become the strongest man in the universe.