[BRIEF BACKSTORY | LOTS OF SPOILERS]
Velnaught wants to make a medicine for Lin You to cure her blindness. When developing the medicine (Crimson Medicine), instead he creates a drug that will turn people to monsters. Titus knows that, and he wants Velnote to give it to him so he can use it as a weapon. Knowing what Titus plans of, Velnaught escape and that makes him being branded as a traitor. Jurgen on the other hand is someone who is working for Titus. Titus ordered him to capture Velnaught, but he failed