Natsu and the gang go on a scuba diving field trip with there class but a storm almost drowns lucy but luckily natsu was there to save her. When natsu and lucy don't come up above the water the gang starts to worry. Hours later and they both are still under water, or so they thought. Lucy and natsu actually got swept up by the giant waves and end up on a stranded island with nothing to survive with and no way to get off the island!!!