First, i´m german Guy and my english is really horrible so i can not write a good Description to beat this Challenges but i can post here my (full english) Video which shows how you beat this Challenges fast and easy.
If you click a Timelink, a new Window opens and the Video start from this Time.
00:05 - The death of Chester
00:50 - Infection: First seal
04:10 - The agony of Sir Reginar
Regards