Cốt truyện

Danylo works diligently in an alchemical workshop he's been entrusted with. It is the first time he's in charge, and he does not want to let the locals down. But the vital component of potions is mana, and the only mine where locals could get mana crystals has been closed. Attacks on cargo and reports of missing people have become more frequent as well. How is the sweet and kind stranger who recently arrived in the village involved in this?