Dan is a short man with a shorter temper, which he expresses by taking revenge on whatever and whomever he determines has wronged him. He has landed in Equestria after a particularly invigorating revenge mission, but he's not staying. With all those magic users around, he's not going to waste a moment getting home to California.
Except that will be more difficult than he thinks.
And more pressingly, King Sombra has wronged him.
(Crossover with "Dan Vs." Project for NaPoWriMo 2015)