Angela Bennett is a systems analyst in Venice, California who telecommutes to Cathedral Software in San Francisco. Her interpersonal relationships are almost completely online and on the phone, with the exception of forgettable interactions with her neighbors and visits to her mother, who is institutionalized with Alzheimer's disease and often forgets who Bennett is. Bennett's co-worker Dale sends her a floppy disk with a backdoor labeled "π" that permits access to a commonly used computer security system called "Gatekeeper" sold by Gregg Microsystems, a software company led by CEO Jeff Gregg. Dale and Bennett agree to meet, but the navigation system in Dale's private aircraft malfunctions and it crashes into a tower, killing him.