The details for the upcoming Far Cry 4 might have been leaked by Ubisoft by Mistake. On the companies pre-order page, that was later taken down, said this about the story. It also talked about what will be in the limited edition.
Hidden in the majestic Himalayas lies Kyrat, a country steeped in tradition and violence. You are Ajay Ghale. Traveling to Kyrat to fulfill your mother's dying wish, you find yourself caught up in a civil war to overthrow the oppressive regime of dictator Pagan Min.
Explore and navigate this vast open world, where danger and unpredictability lurk around every corner. Here, every decision counts, and every second is a story. Welcome to Kyrat.
The free Limited Edition upgrade includes Hurk's Redemption, a series of three-action packed single-player missions. You'll embark on an epic quest to find a rare artifact while using "The Impaler" harpoon gun.