The first section of No Exit establishes the novel as a thriller in which physical isolation, compounded by social isolation created by technological disconnectedness, heightens the tension of the plot. Even before Darby learns of Jay, the kidnapped child in the van, she faces the hostility of nature as the blizzard rages around her. With the sub-freezing temperatures, the landscape becomes so dangerous that her narration characterizes it with active hostility: “One misstep could be fatal. The flora here was equally hostile—Douglas firs whipped into grotesque shapes by powerful winds, their branches jagged and stiff” (13). Though Darby will, later in the novel, come to see the forces of nature as more ambivalent—as they are something she is occasionally able to turn in her favor as she combats the actually hostile Garver brothers—her initial reaction to the snowstorm that leaves her stranded hints at the dilation of space that occurs in a confined-spaces thriller: “And tonight, on the eve of Snowmageddon, or Snowpocalypse, or Snowzilla, or whatever meteorologists were calling it, White Bend might as well be on the moon” (11-12). This introduces the common refrain throughout the novel in which the meteorological conditions shift the meaning of Darby’s journey.

These chapters introduce the theme of Mistrust of Strangers, Mistrust of Self as Darby struggles to decide whom, if anyone, she can trust. In particular, Darby’s anxieties about the group at the rest stop lead her to approach the problem rationally: She tries to match cars with owners, believe that such a strategy might give her insight into the trustworthiness of each person. Yet Darby’s anxieties also lead her to question her own instincts. When Darby returns to the rest stop immediately after seeing Jay’s hand through the van window, she encounters Lars for the first time. She senses and then feels and hears him before she sees him: “He was breathing down the back of her neck […] Somehow she already knew this fourth traveler was a man—women just didn’t breathe like that” (18). Although Darby’s initial encounter with Lars inspires her fear and suspicion, she pushes herself to remain rational and observant. She observes, “[H]er gut said that Rodent Face was the driver of the gray van. But that was an assumption. She knew the kidnapper/child abuser could be anyone here. Any of the four strangers trapped at this roadside shelter could be—no, was—a suspect” (20). Ultimately, Darby tries to find balance between her gut feelings and what she can actually prove. This uncertainty, including of oneself, is a primary strategy of the thriller genre, which keeps readers anxious to keep reading to finally learn the truth.

In this way, the novel also introduces the theme of Perception Versus Reality. Just as Darby struggles to determine whether her interpretation of her circumstances is true or not, readers are also challenged to make their own assessments of the details provided. While Darby’s instincts about her perception of Lars ultimately prove true, reality is shown to be much more complicated throughout the novel. In this way, instinct is not shown to be necessarily flawed so much as incomplete. Further, rational thinking—exemplified by Darby’s assumptions that cars offer character insights—is shown to be limited as well. Darby’s perception that a kidnapping has taken place and involves whoever owns the van is true, but also only part of the story. The novel follows along with the typical thriller structure, which provides pieces of truth that cannot account for reality in total. The utility and contrasting fallibility of both instinct and rational thinking augment the thriller’s unpredictability: If thinking can prove correct or incorrect and instinct can prove correct or incorrect, then characters and readers will have great difficulty anticipating what comes next.