-The infection of the Snow Country-

A major incident had occured when a failed attempt at a massive mist technique was used near a toxic waste dump. The mist carried along this toxic waste in a poisoness mist that drifted along the lands of the ninja world. Shinobi capable of harnessing their chakra used their strength to protect themselves from the airborn spread of this virus.....saddly those who weren't capable of this feat did not survive. All citizens withought proper ninja training have died from the spread of the illness and the population dwindled greatly.......this was 2 weeks ago....

-Two weeks later-
Scouting Ninja: "Sir I think you should come see this!!!"
Jounin leader: "What is it?"
The band of ninja came across another human being. They inturned attempted to help this person not knowing of the drastic event that was about to unfold.

Scouting Ninja:"SIR THE SURVIVOR ATTACKED ONE OF OUR MEN!!!"
Jounin:"What do you mean"
Scouting Ninja:"Sir I am saying that GAHHHH!!!"
It was too late..... the infection has spread..... The world as we knew it is gone. Now we as shinobi are powerless since every ounce of our chakra is protecting us from the airborn spread of the virus. It is time to take back out land from these undead beasts... that or we will forever be lost in history.