Chapter 21 Summary, Analysis, and Key Takeaways

⚠️ Spoiler Warning: This guide contains detailed spoilers for the entire novel. Proceed only if you've finished reading or are comfortable knowing the plot.

For the previous chapter, see Chapter 20 summary, and for the next, see Chapter 22 summary.

(Note: The chapter numbering in this companion follows the book's internal chapter labels, so this is the chapter titled “Chapter 21” even though it appears as the 22nd chapter in the overall sequence.)

Summary

The chapter opens three weeks before the main events of the novel, in a flashback. Blaine and Chloe are standing in the school parking lot beside Chloe's black Mercedes on a warm May day. Chloe is uneasy; her relationship with Blaine has been deteriorating. His texts have become shorter, and they spend less time together. She suspects he is lying to her, just as she knows he lies to his official girlfriend, Kassidy.

Blaine asks Chloe to drive him to Izzy's apartment, claiming that Ms. Morales is tutoring him in calculus. Chloe immediately recognizes this as a lie—she has seen Blaine in Ms. Morales's classroom with other students after school, and no teacher tutors at home. She confronts him, but Blaine responds by threatening to end their relationship, saying he already has a girlfriend with too many expectations. Chloe, desperate to keep him, apologizes and mentions a vague medical issue to deflect. She agrees to drive him.

After dropping Blaine off, Chloe parks nearby and watches the apartment building. She feels pathetic for spying, but her jealousy and suspicion drive her. She dozes off in the car, and when she wakes, she sees Izzy and Blaine arguing on the sidewalk. Izzy is furious, gripping Blaine's arm and threatening to tell Kassidy about whatever has happened between them. Blaine shakes her off and dares her to try. Just then, Fergus arrives in his lime-green Audi and drives Blaine away, leaving Izzy alone and enraged. Chloe watches, feeling a mix of anger and recognition—she understands Izzy's fury all too well.

Key Events

Blaine asks Chloe for a ride to Izzy's apartment, claiming a calculus tutoring session.
Chloe sees through the lie and confronts him, but Blaine threatens to break up with her.
Chloe apologizes and mentions a vague medical issue to smooth things over.
She drops Blaine off and then parks nearby to spy on the building.
Chloe falls asleep and wakes to see Izzy and Blaine arguing outside.
Izzy threatens to tell Kassidy about Blaine's actions; Blaine dares her.
Fergus arrives in his Audi and takes Blaine away, leaving Izzy furious.

Character Development

Chloe – This chapter reveals Chloe's deep insecurity and her willingness to accept lies to keep Blaine. She knows he is deceiving Kassidy, yet she still fears losing him. Her decision to spy on him shows how far she has fallen from her earlier pragmatic self. The chapter also hints at a possible medical condition she is hiding, which adds a layer of vulnerability.

Blaine – Blaine is manipulative and controlling. He uses the threat of ending the relationship to silence Chloe's questions. His lie about tutoring and his confrontation with Izzy show his pattern of deception and his willingness to escalate conflicts. His dare to Izzy suggests he is confident in his power over others.

Izzy – Izzy is angry and confrontational. She threatens to expose Blaine to Kassidy, indicating she is not afraid to challenge him. Her fury at being left behind suggests she feels used or betrayed.

Fergus – Fergus appears as Blaine's accomplice, arriving to whisk him away from the confrontation. His role is brief but suggests he is complicit in Blaine's schemes.

Themes, Symbols, or Motifs

Infidelity and Deception – The chapter is steeped in lies. Blaine lies to Chloe about the tutoring session, and Chloe knows he lies to Kassidy. The web of deceit is central to the plot, as it sets up motives for murder.

Surveillance and Stalking – Chloe's act of parking and watching the apartment is a form of surveillance. She feels like a stalker, which highlights how jealousy can drive people to extreme behavior. This motif foreshadows the larger mystery of who is watching whom.

The “Other Woman” Dynamic – Chloe's internal monologue about being “the other girl” underscores the power imbalance in her relationship with Blaine. She cannot trust him because she knows he is unfaithful, yet she stays.

Threats and Intimidation – Izzy's threat to tell Kassidy and Blaine's dare create a tense power struggle. This theme of blackmail and intimidation is likely to play a role in the murder plot.

Erosion of Trust – The chapter shows how trust erodes between Chloe and Blaine, and between Izzy and Blaine. This erosion is a precursor to the events that lead to the murder.

Why This Chapter Matters

This flashback provides crucial backstory for the relationships among the main characters. It establishes the romantic tensions and deceptions that motivate their actions in the present timeline. Chloe's spying and Izzy's threat to expose Blaine create a volatile situation that could easily escalate to violence. The chapter also introduces the possibility that Chloe has a medical condition, which may be relevant later. Most importantly, it shows Blaine's manipulative nature and the many people he has wronged, giving readers a sense of who might have wanted him dead.

Study Questions and Answers

1. Why does Chloe agree to drive Blaine to Izzy's apartment even though she knows he is lying?

Chloe agrees because she is afraid of losing Blaine. When he threatens to end their relationship, she immediately backs down and apologizes, even though she knows he is not telling the truth. Her fear of abandonment overrides her suspicion, and she also mentions a vague medical issue to deflect his attention. This shows her emotional dependence on him.

2. What does the argument between Izzy and Blaine reveal about their relationship?

The argument reveals that Izzy is aware of Blaine's infidelity and is threatening to expose him to Kassidy. Blaine's response—daring her to try—shows that he is not afraid of the consequences, suggesting he has some leverage or believes he can handle the fallout. The confrontation is heated and physical, indicating a history of conflict between them.

3. How does Chloe's reaction to the argument mirror Izzy's?

Chloe watches the argument and feels a sense of kinship with Izzy's fury. She understands why Izzy would want to “rip him to pieces,” as the text says. This mirroring suggests that both women have been wronged by Blaine and that their anger could be a motive for murder. It also highlights the theme of jealousy and betrayal that runs through the novel.