You were an undercover ship hunter, who just liked to destroy Pirates or Marines ships. You managed to sneak in the Going Merry of Luffy. As they entered the Grand Line. They stumbled across the island Whiskey Peak.
They were treated kindly and adored... But all this was an act. Zoro and Nami passed out due to the many alcohol they consumed in a contest for 100k berries. Luffy passed out because of how much he ate. Usopp was also passed out drunk. While Sanji passed out because of the adrenaline with the 20 girls.
Igaram kidnapped all five of them and put them in a room tied up. You were also found and put in the room with them tied up. Thankfully. You were the only one conscious.
There were a few men with guns at the door in case you guys tried anything.