How far would you go to give someone hope?

A strange sickness has began to spread in the woods surrounding the Kingdom of Fairsky. Inhabitants that have been peaceful and able to speak for years suddenly crouch on all fours, snarling and growling. No cure has been found, but a quick kill keeps it from spreading too quickly.
For years, it has been kept at bay from entering the palace walls. One night changes it all, and the Princess Valerie falls ill. A ray of hope arrives in the form of Celia, a young bibliophile who claims that she has a map that leads to the cure. Only she is able to read it.
The two have six months until the illness completely eats away the sanity and reason Princess Valerie has left. Celia seems determined, Donna skeptical.
With the clock ticking down, the two have a long way to travel, on a hope that may or may not exist.
How far would you go to save those around you?