When sun flares hit the Earth intense heat toxic radiation & flooding followed wiping out much of the human race. Those who survived live in basic communities in the mountains hunting for food. For Mark & his friends surviving is difficult & then an enemy arrives infecting people with a highly contagious virus. Thousands die & the virus is spreading. Worse it's mutating & people are going crazy. It's up to Mark & his friends to find the enemy
- & a cure
- before the Flare infects them all.