What do you do when the power goes off?

Terrorists have got acquired an awful new weapon that may crash the energy grid and plunge America right into a new dark age. A coordinated attack is planned to shut out all lights and emergency services to ten major towns. Planes will fall, clinics will go dark, no help should come.

And for the reason that terrible darkness, a dreadful plague will end up being released. If the lights go off, nothing can end the bioweapon from eliminating millions.