Essence of Hope
Six months ago the Queen of the humans was called to a secret mission by the ambassadors of the two neighboring nations, that of the Elves and of the Dwarves. Here she was told she had two months to gather a remnant of her people. This remnant would be the survivors, all the rest of the humans were going to die. This was not a friendly warning meant in goodwill to safeguard humanity. This was an ultimatum, choose a few to live, away from their home, or all would die.
The Elves had reached a realization/discovery/prophecy/warning that humans would be responsible for (world altering event, unknown if good or bad). Knowing they had not the strength to destroy the fledging humanity they shared their realization with their long time allies, the dwarves. The Dwarven king recognized the threat, but also knew of the awe-inspiring feats that humanity had accomplished and the growth that the young race was capable of. They convinced the Elven leader to hold off on the total destruction of humans and to instead save the good and wipe out the bad.
The Queen gathered her most trusted knights and sent them in the city and the outlying realms with instructions to find and bring the truest of the true to the city, these people were to be kept safe. She went to her daughter and told her only of a journey that needed to be taken for the good of the people. She spoke of a recent-discovery-of-a-far-away-land/a-shortage-of-food/weapons/building-materials and the need for the Princess to take some of the people there. After speaking to her daughter she pulled aside the Princess’ consort a young elf male and swore him to secrecy till they landed.