The War: The beginning of the sickness

Ava was just a little girl living in the city of Pheonix. Her life was going well until It came. Some called it a sickness, others a curse. People who were affected by it gained powers, some used there powers for evil others for good. They were called the 'marked' and people liked them for w hole but that soon ended. The 'unmarked' were the people who didn't form powers; The Unmarked felt threaten and attacked them, Friend against friend. They were captured or killed but some marked escaped making a haven, but as more Marker have escaped they are planing to fight back against the Unmarked.
Will it be the end of civilization or can Ava race against time and stop the war?