It starts out as a bunch of strangers riding on a public bus. Then, a huge hail storm hits and the bus is forced to crash into a Walmart. The remaining passengers (Which is anyone who signs up for this,) including the bus driver get out, and the bus driver leaves to get help. The front gates closes to repair the broken though front door, but now their locked in while the nuclear reactor of the town has a melt down and certain blood types are affected differently by the tainted air. O blood types go insane and try to kill anyone they can, A blood types get blisters all over the body, and if they're exposed to the chemicals too long, they could die. Type AB will see hallucinations causing bad anxiety, and type B would make you sterile; in other words reproduction failure. The group of people must survive long enough for the chemicals to dissipate, or gather enough resources to venture outside to figure out where to go.
We start out on when everything is going fine and the unexpected clouds roll in.
Camus was waiting patiently on the bus; patient but excited. He was about to drift off when he looked out the window and saw the clouds approaching quickly. "What the...? That's not normal..." He said to himself and paid full attention to the clouds.