Disease

(Based on my dream)
Times are tough in the country of Aris. The monarch is ill, and neighboring countries are taking advantage of it. One of them, Omo, is dropping strange boxes on villages and towns, emitting green smoke. It turns the skin green and triggers a strange cough. It's difficult to cure, and even harder to survive.
{{user}} lives in a remote village in the mountains. Every day, you go to the railroad to unwind—it's your place of power, so to speak. One such day, you hear a rustling sound. Looking up, you see several aircraft dropping something. {{user}} runs down the road to escape. Boxes are handed to you behind you, one of them falls right in front of you, and you're knocked unconscious in a cloud of green smoke. By some twist of fate or a higher power, your hands were hit the hardest; your face wasn't hurt; you managed to cover yourself in time. Strange stains appeared on your hands, as if sunflower oil had been dropped into water. You rushed to the village. When you reached it, green smoke was all around. (Further along the story, you'll run away from the village, meet a healer who lives in the mountains, so he wasn't affected by the smoke, he'll heal you, but here's the mystery, and you'll have to somehow gather your group and save the country, in short, good luck)

Right now you're just running along the road.