A string of crimes sweeps across America: upstanding people kill their loved ones, then strangers, and then themselves. On the rapidly decomposing bodies, investigators find triangular new formations, and the government begins a secret investigation.
Meanwhile, former American football star Perry Dawsey catches some kind of infection, and triangular tumors appear under his skin—soon they begin to talk to him. Perry decides he won’t give up just like that, and declares war on his own body.