From the release:
Quill: White Box is a new way to play the award-winning Quill letter-writing solo roleplaying game, inspired by the original version of the famous fantasy game.
For the first time, create a classic fantasy character from classes like fighter, cleric, thief, elf and dwarf, each with its own special ability to help you on your letter-writing adventures. Use the same character through multiple adventures, gaining treasure and magical items like enchanted perfumes and hypnotic parchment to give you the edge.
Quill: White Box features five new fantasy adventures:
The Demon-Haunted Tower - find a way into a mysterious tower that is slowly draining the life from a surrounding village.
The Elven Princess - bring two lovers together from different worlds.
Uncharted Waters - convince an old enemy to raise an ancient pirate from the dead in order to reveal a hidden isle.
Fane of the Underking - get your incredible story of dungeon-crawling heroism picked up in the city gazette.
The Beast of Nightwood - create a field journal documenting the existence of a mythical creature.
Treasure, fame and adventure are all yours with Quill: White Box. Note that you must have the Quill core rules to play.