From the Publisher's Website:
Infected with dark, necrotic magics while dying, the half-dead have returned only part-way to life, their flesh afflicted by an undead curse. Though they can be killed, Death’s grip upon the half-dead is a slippery one at best. Half-dead characters—whether tragic heroes or dark villains—hound their foes relentlessly, driven to action by the horror of their condition. Many half-dead seek to hide their nature from others. When the half-dead are finally revealed for what they are, much of the world responds with horror, revulsion, and worse.
Inside this PDF you’ll find a complete player race for Dungeons & Dragons Fourth Edition, along with ten racial feats to bring the horror within to life. You’ll also find a monster template, a dead minotaur back for revenge, story ideas, and power cards.