The Choice

Once upon a time, in a land not so far away, there lived a great King. In the kingdom, the children were the greatest treasure to the King. In the shadows of the kingdom lurked an evil prince. His single purpose was to capture the children and take them from the King.
A great tragedy occurred when one day the children were all struck with a deadly disease. A gray poisonous mist had been breathed into their bodies.
The King's heart was broken. Was the evil prince responsible for this? Was there a cure for this deadly disease? There was. However, the cure was very costly and came from a source that surprised and horrified the children. Would the King send the cure? Would the evil prince interfere? More importantly, would the children choose the cure?