But the tale of The Intruders truly begins when Jack Whalen, a former cop with a troubled past who has of late become an accidental author of sorts, gets an out-of-the-blue visit from Gary Fisher, a high school classmate he hasn't seen in two decades, and one to whom he was only mildly acquainted -- making the seemingly impromptu reunion even more suspicious to a been-there-done-that kind of guy like Jack