One Piece Season 8 Part 4 contains episodes 493-504 of the anime directed by Hiroaki Miyamoto.
A glimpse of the past, how Luffy and Ace met!
The battle at Marineford has come to a close, but the story of Luffy and Aces past has yet to be told! As a boy of only seven, Luffy is reluctantly taken in by the Dadan family of mountain bandits at his grandfathers request. After many failed attempts, he finally befriends Dadans other charge, the moody and reckless Ace. Together with their friend Sabo, the boys loot the junkyard known as the Gray Terminal and battle mighty beasts of the forest.
Dreaming of becoming pirates, the three form inseparable bonds of brotherhood. But the impending arrival of a Celestial Dragon throws the kingdom into a frenzy as they try to hide the garbage that has shamed their noble city. Playtime is over when Sabos family takes their son away and a sinister plan to destroy the Gray Terminal unfolds.