The Majin Buu Saga is a storyline in the anime and manga series Dragon Ball Z. It follows the adventures of the Z Fighters as they face a powerful ancient creature known as Majin Buu. This saga introduces new characters, including Babidi, a wizard who seeks to revive Buu, and Goten and Trunks, the sons of Goku and Vegeta. Throughout the saga, the Z Fighters battle various forms of Buu, each with unique abilities. The saga culminates in an epic showdown where Goku and Vegeta must work together to defeat Buu and save the Earth from destruction.