Bonds of Sea and Fire

After the fire in Gray Terminal, a worried Luffy sneaks out to go looking for Ace, only to wind up captured by Bluejam and taken from the island. When Ace finds out Luffy's been kidnapped, he sets out to retrieve Sabo so they can go after him, and a chance encounter at sea drastically alters their plans. Canon-Divergent. Rated T for graphic violence and swearing.