The Traveler's Riddle

There once lived a princess and prince, with magic powerful and grand. with exalted titles and alluring wiles, they were hunted by many across the land. Puffed up on his own bravado, Prince Erik embarks on a quest to fetch an army for his father the king. How was he to know there were those out there willing to kill and rob him? Thankfully, he has his sister Abby by his side. Armed with his charm and her stellar wit they might just make it out alive. Yet when they arrive at the neighboring King's castle, the royal ropes Erik into an ultimatum that could snatch away his freedom. In a last ditch effort to save her brother, Abby poses a riddle. One answer will bind Erik to the neighboring kingdom for all eternity, the other will grant them the sought after army. Is Abby's magic cunning enough to outsmart their enemy? Or will her brother pay the price for her failur