Ok, seems super generic... but I am going to keep reading because I want to know WHY he got poisoned. Seemed like just some cog at a black company. What is the point of poisoning him? Zero interest in the girl's story because it is so cliche.
Ah yes, good old self fulfilling prophecies. Mild mannered adventurer has powerful ability but has no intention of misusing it. People are afraid anyway and betray him. Now he is misusing it and they will jump up and say they were right to fear his power.