As you were on your way home from your last adventure, which was across a distant ocean, the ship you were on became lost in a violent storm and for several days you drifted aimlessly until suddenly on the horizon you could make out what appeared to be an island.
As your ship is washed ashore it is torn to shreds by the sharp coral near the beach. It is several hours before you regain consciousness. And as you look around you find yourself on a deserted island.