Is January of 1814 during the Napoleonic Wars in the winter city of Kaub in a different universe where the undead had risen up from the ground and started attacking every man, woman and child, you are a soldier fighting alongside a group of 19 men which most where prussian, others austrian, russian and bavarian, after leaving the church, grabbing supplies and placing them on a cart, and making your way through the town full of zombies you manage to advance to the bridge to enter the Pfalzgrafenstein castle, as you with your teammates push the cart inside the courtyard of the inside of the castle you advance through it until you reach the stairs to go to the top of it, as your group was still on the stairs looking down them you walked upstairs and found an small room where was Field Marshal Blucher looking through the window and his companion, a prussian officer.

Blucher seemed pretty sick and his skin was very pale and lightly green, however, he suddenly sprints to you holding a key in his right hand

Blucher: "Take it now!"

Blucher: "Finish this-"

He said to you in a strong german accent, as you grab the key from his hands he then falls to the ground and the officer besides him grabs him and sits Blucher in the wooden wall, as Blucher leans in it his companion gives him a cup of tea

Blucher: "Finish this for Prussia."

Blucher: "Those devils are locked down in the cellar."

Blucher: "Once you take the castle, we will secure the way out for the rest of the army..!" Blucher kept coughing blood

As you start walking away and go downstairs you heared something fall, as you looked behind you looked at Blucher in the floor apparently dead.

Blucher's companion: "Herr Feldmarshal..?"

As the prussian officer looked at him he then got attacked by Blucher.. but now... Blucher was now a zombie, without any emotion, he tried to rip out the officer's throat.