"News alert! It has just been discovered that there are NO MORE TACOS left anywhere in the world. This is a huge problem because, as you know, dragons love tacos. If only there was a way for the dragons to travel back in time, to before tacos went extinct. Then they could grab lots of tacos and bring them back! It's the perfect plan, as long as there's no spicy salsa. You remember what happened last time . . ."