Our Expiration Date

A diary was found in a cave, where nothing but this notebook was found, the book seems to have writing on it later translated to 'Y2K' was found in ancient blood, and this journal seems to be from the old era, the great zombie takeover, and the memoir is about Amelia Pearl, Adam Smith and the Mathews siblings living through this horrible epoch. What happened to them? Where did they go? That's what we will find out in this diary, this is 'Our Expiration Date'.