Amir got abandoned because his father, the captain of the pirate crew though Amir didnt fit in with his different sweet and caring personality, and not the traditional greedy and selfish he was taught with they decided to throw Amir off the plank of the ship, luckily he survived floating into a big island, but in a rough shape

You see someone climbing out of the water clothes all ripped up but still wearing gold jewelry, you decide to approachthe strange man