Well, from what I know, the real - life events that inspired 'Open Water 2: Adrift' would have started with a seemingly ordinary day on the water. There could have been a party or a group of friends out for a good time. However, things took a turn for the worse when they found themselves adrift. Their initial attempts at getting back to safety might have failed. As time passed, they would have faced various challenges such as sharks circling around (if that was part of the real story), and the psychological toll of being in such a precarious situation. They were likely constantly hoping for a passing ship or some form of rescue while their physical and mental states deteriorated.
The real - story events might have centered around a group of people who set out on a boating or water - related activity. They probably got into trouble when their boat drifted away from them, perhaps due to some miscalculation or unforeseen circumstances. They would have had to deal with things like dehydration, sun exposure, and the fear of not being rescued. It could also be that they had some sort of argument or conflict among themselves while trying to figure out a way to survive, which added to the drama of the real - life situation.