Zombie is off to visit his grandparents for the school holidays, which already sounds lame, but now he has to share a room with his brother! Bleugh. So Grandpa Oswald sends Zombie to the attic, claiming he’s sure to find something there to pass the time. Bored, and just a little bit curious, Zombie begins exploring the attic when he discovers some old family diaries. He expects to uncover juicy family secrets, but instead stumbles into something far more than he bargained for. From fighting in the Zombie Special Forces, to flying a plane and even saving the Overworld from a mad scientist, Zombie’s holiday is about to get epic.