Son Goku is the greatest hero on Earth. Five years after defeating the demon king Piccolo, he's grown up and had a family--he's married, and he has a child, Son Gohan. But what is the real reason for Goku's incredible strength? A visitor from outer space arrives bearing terrible news--Goku is an alien, and the visitor, Raditz, is Goku's brother! When Raditz turns out to be a ruthless killer, Goku must fight his incredibly strong brother to save his family and the entire human race. A surprising alliance may be Earth's last hope: Goku will team up with his old enemy Piccolo...archenemies united to save the world!
Best manga ever
The story is about Son Goku who is a Saiyan when his older brother comes down to earth and kidnaps Son Goku's son Gohan and him and Piccolo need to team up to defeat him. In other word two enemy's team up because they have a common enemy do they succeed well that's for you to find out