It takes place in Michigan, near the Great Lakes. The lakes are one of the most radiated places on the wasteland, and few settlements are near them. Only the finest boats can go out there without melting in the heat. One day, a small settlement sees a large shape out on the horizon. It looks like a large boat, and there amazed. Suddenly, they see more, of the same size approaching. When they finnaly stop coming there are about 7 of them, all the size of aircraft carriers. But, out of the blue, they see large guns come out of the ships. 4 for each ship. The guns all fire and compleatly decimate another nearby settlement. There is nothing left there but a crater. So the people of the first settlement call in for help. You'll either be the help, someone on the ship, or just another wastelander caught in the middle.
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Edit: Added poll