In The Witcher 3: Wild Hunt you become Geralt of Rivia, a monster slayer for hire. You take on the greatest contract of your life -- tracking down the Child of Prophecy, a living weapon that can alter the shape of the world. Your journey will take you across the Northern Realms, a vast continent filled with merchant cities, mysterious islands, dangerous mountain passes, and forgotten caverns to explore. Hundreds of armour and weapon upgrades await you, with lethal sword and magic skills at your disposal.
As far as we're aware, the game is still currently on track to be released on May 19, 2015.