Incendiary Designs (Unabridged‪)‬

Jogging through Chicago's Lincoln Park, Dr. John Caleb comes upon a group of fanatics setting a police car on fire - with the officer inside. Caleb rescues the man but as Chicago heats up in the most brutal summer on record, it becomes clear that this is the first of a series of deadly arsons.

As Detective John Thinnes races to find the culprit and Dr. Caleb sets a trap for a murderer, both men are nearly incinerated in the killer's final act.