A Trying Time: Obtain the Strength of Legends!
At Kami's Lookout, Videl holds steadfast in her belief that Gohan is still alive, despite the bleak outlook shared by the others. Far away in the realm of the Supreme Kais, Gohan faces the legendary trial to free the ancient blade, seeking to master a force capable of turning the tide against Majin Buu. Meanwhile, the dark duo of Babidi and Buu continue their path of devastation, closing in on critical information that could jeopardize the Z Fighters' plans.
Aired 12/10/2014EP 27 - A Trying Time: Obtain the Strength of Legends!

Dragon Ball Z Kai: The Final Chapters
Since Cell's defeat Gohan has grown up and go to the university then she meets Videl which who has some adventures, then both and his new brother Goten are training for the new tournament, in which Goku came back from the dead for one day. In half of the tournament a misterious persons advice the group about the resurrection of the dangerous Majin Boo, but all plans fails and every one try new ways to stop The dangerous Majin Boo who gets stronger each time. Goku and his friends make everything for stopping them through fights.
(Source: Anime News Network, edited)
Note: Remastered version of the Majin Boo arc that adheres more to the manga's story.