David has agreed to join John on his expedition to see if his time travel idea works, we join them as they are traveling around the Bermuda triangle an area renowed for ships and aircraft disappearances. in the last episode John told of the theory that the disappearances were due to a black hole who's opening appears periodically in the Bermuda triangle area. David has found a way of predicting where the next black hole will appear, or at least its outward appearance of a storm. However he is having a bit of trouble with his mathematical prediction model.