This is the rough outline:
Fiends of the Eastern Front: Downfall
Hitler discusses his escape plans with Captain Gruber, head of his special guard. The he retires for the night with Eva Braun.
Later, Gruber loses contacts with his men guarding the Hitler's quarters.
He finds them dead, drained of blood. Hitler is locked in.
Hitler wakes up to find Eva Braun standing over him, She leans forward, baring fangs. Hitler runs her though with the spear of destiny, which he keeps in a box near his bed.
A bat flies in, Hitler takes cover.
The bat turns into Captain Costanza.
Costanza: “The war ends tonight.”
Hitler throws the spear.
Hitler: “It has only just begun!”
Costanza is hit by the spear, but pulls it out.
Costanza: ouch. Is this the spear of destiny? A worthless trinket.
Hitler produces a machine gun.
Hitler: Let's try something a bit more scientific then.
Hitler blasts Costanza. Who vanishes into a fog.
The fog coalesces behind Hitler into a figure, who then bites Hitler's neck.
Hitler: Aaaargh – eh?
Costanza:By the Gods, your blood is stagnant with evil.
Hitler: Ha, Vampire idiot. You have no idea what I am capable of.
Costanza: You may be right.
Costanza shoot him in the forehead.
Costanza: Better if we never know.
The door to the quarters clicks open. Costanza emerges and gives his gun to Gruber.
Costanza: The Fuhrer tried to kill a vampire with a machine gun. A clear case of suicide.