Episode 483

"Looking for the Answer - Fire Fist Ace Dies on the Battlefield" is the 483rd episode of One Piece.

Short Summary
Ace is punched by Admiral Akainu, and falls into Luffy's arms. He then thinks about his past, and remembers his goal in life. It was to find out whether or not he had deserved to be born. As everyone else stares in shock at Ace's wounds, they deduce that his organs were burned up and tell Luffy that Ace will not make it. Just as Ace dies, he thanks Luffy for everything, while Luffy cries for his brother.