Flashlight

Susan Choi

56 pages 1-hour read

Susan Choi

Flashlight

Fiction | Novel | Adult | Published in 2025

A modern alternative to SparkNotes and CliffsNotes, SuperSummary offers high-quality Study Guides with detailed chapter summaries and analysis of major themes, characters, and more.

Themes

Content Warning: This section of the guide includes discussion of illness and racism.

Loneliness in Family Life

The novel posits that familial alienation and feelings of otherness begin in childhood. Serk registers his loneliness as the only member of his family of origin who enjoys the state of his life during the war. Because he is still a child, he has no frame of reference for his Communist-leaning parents’ discontent with the Japanese government or for their growing desire to return to their homeland. When they express their intent to migrate to North Korea, Serk makes an impassioned plea for them to remain in a country that offers opportunities despite facing poor treatment as second-class citizens. His choice to stay in Japan even when his parents depart represents both his alienation from his parents and his hope for their return. Similarly, Louisa inherits her parents’ loneliness by being the only witness to their secrets, as Serk introduces Louisa to his sister and Anne to her first son, each without explaining that these are Louisa’s relatives. Louisa’s lifelong feelings of fear, and her desire to assimilate and not be noticed, stem from the emotional instability of this kind of childhood.


The novel does not portray marriage as necessarily a salvation from loneliness. Anne and Serk begin as kindred spirits because she has also experienced loneliness growing up neglected in a large family. Anne is drawn to Serk because he might be able to understand her loneliness. However, the precarity of Serk’s residency in the United States forces him to hide his past, even from Anne, to protect them both: If he were to reveal the truth, it may implicate her in his expulsion from the country. His fear of trusting her becomes a divide between them. This is exacerbated by the intimacy Anne perceives between Serk and Louisa; Anne is envious of her daughter, causing another layer of isolation. In turn, Louisa’s marriage to Roman recapitulates this dynamic; she can only accept with resignation the fact that she will never fully know her husband.


In contrast, Anne’s second marriage to Walt and Louisa’s growing connection to Tobias show that connection between family members is possible—but only through vulnerability and the willingness to share secrets. Walt is lonely in his own way, but his insistent companionship eventually breaks through Anne’s self-protective prickliness. Still managing her grief at Serk’s disappearance, Anne worries about implicating Walt; however, she eventually is able to share with him her worries about her failures as a mother.


When Tobias introduces himself to Louisa, he kicks off the process of Louisa recovering her memories of her past and of Serk’s disappearance. Tobias’s openness to the world and to the truth contrasts with the Kangs’ tendency to obfuscate, hide, and prevaricate in a misguided attempt to protect one another. Influenced by Tobias’s unwillingness to countenance familial loneliness, when Louisa reunites with Serk, she is primarily interested in developing whatever closeness is possible—even at the cost of Serk ever identifying her as his daughter. When she lies to him that Anne is still alive, to bring him relief in the shadow of his impending death, Louisa transforms her parents’ secrecy into comfort. Through the Kang family’s dynamic, Choi shows that isolation even for the purpose of protection is destructive; instead, connection and mutually shared pain is a better expression of love.

The Limits of Human Memory

Through several decades of history, the Kangs reckon with the deleterious effects of time upon memory. Consequently, the frailty of human memory becomes a powerful obstacle in the Kang family’s quest to understand their lives.


At the start of the novel, trauma is shown to block recall. After Serk’s disappearance, Louisa cannot corral her thoughts about what happened that day. She insists that her father was abducted, but cannot supply the testimony required to convince the adults around her of the truth. Instead, they countermand her memories with the theory of Serk’s accidental death, overwriting what little she memories she does have access to. Louisa’s traumatic forgetting thus undergirds the deeply unsettling fear and inexpressible grief that haunt her through her life.


The challenge of remembering an increasingly distant past recurs often in the novel, which uses structure and rhetorical devices to highlight this tendency. The novel depicts only events that are relevant to the establishment of the Kang family and their splintering, but the chronology of the novel is often fragmented, as chapters move backward and forward in time and portray incidents from the perspectives of different characters in asynchronous ways. Omissions of long periods of the Kangs’ lives also add to the sensation of memory gaps. For example, chapters exploring Louisa’s adult life jump from her first marriage to Roman and the birth of her first child to her second marriage with George; no explanation is offered for how the first marriage ended or the second began. Although the novel claims that her three sons are important relationships in her life, none of them appear in the narrative. Similarly, Anne’s story jumps from the first year of her relationship with Walt to Walt’s death, signaling that the time in between is easily forgotten.


When the past does resurface, it is through external means, such as artifacts or sense memory. As Louisa and Anne become passive investigators of the novel’s main question—Serk’s fate—other pieces of evidence also lead them to other forgotten truths. For instance, Anne eventually solves the mystery surrounding Serk and Louisa’s beach photo when she finds it in her purse. Confronting Louisa, she learns the secret Serk had been keeping from her about Mrs. Ishida. Similarly, Louisa uncovers the meaning of the strange diary entry she’d written, ostensibly predicting Serk’s disappearance, when she visits Hawaii with George and the smell of the island reminds her of her previous visit. This drives her to probe her memories of Serk’s abduction for the first time in decades, foreshadowing the revelation that Serk survived.


The end of the novel sees Louisa and Serk reckoning with the ways their memories have been involuntarily suppressed. Serk’s cognitive illness, an external dampener of recall, affects his ability to recognize Louisa. Meanwhile, Louisa’s repression of details about Serk’s abduction dissolves when she accesses a memory she hasn’t been able to before: swimming to safety away from Serk’s North Korean captors. In the end, Louisa is comforted at Serk’s lack of surprise to her presence, which suggests that he has held onto Louisa in his mind throughout all the years they’ve been apart even as his memory has failed.

Tension Between Belonging and Identity

The novel considers whether identity is bestowed by external circumstances or self-determined. For Serk, identity seems to be both innate and easily shifted as he makes his home in different parts of the world. Serk is a man without a country, yet he also calls many different nations his home. When his story begins, he is forced to reckon with the dichotomy between his Japanese and Korean heritage. He grows up believing himself to be Japanese, but is suddenly made to understand that his ethnicity is Korean—a people seen as inferior in his adopted country. His parents migrate to North Korea despite not coming from the north to find belonging. When he stays in Japan for a different kind of inclusion, Serk is instead treated as a second-class citizen because of his ethnicity, which diminishes his Japanese nationalism. In response, Serk makes the choice to work towards becoming an American.


In contrast, Louisa’s multiple heritage precludes her from defining her own identity, especially when Serk moves the family to Japan. Instead, Louisa can only internalize feeling othered: Being an American and half white makes her Japanese peers exoticize her. Louisa responds by wanting to be invisible; she assimilates as best as she can, learning Japanese and making friends with her schoolmates. Louisa’s desire to fit in completely makes her resent Anne, whose illness precludes her from joining town life and whose whiteness cannot be hidden. When Serk disappears and Anne returns to the US, Louisa is again made to bear the brunt of having her identity dictated to her by bigots: The novel implies that Gerald and his wife throw her and Anne out of their home in part for racist reasons.


Unlike all three Kangs, Tobias is able to completely create his identity regardless of external forces. After his brain surgery extracts a tumor and fundamentally alters his personality, Tobias stops reacting to how he is perceived by others. Ironically, this allows him to blend seamlessly into the communities where he finds himself, in spite of his status as a permanent outsider. Anne is shocked to see that he has become part of the Japanese town where the Kangs live in a matter of weeks.


When Serk is abducted, the Japanese identity he was denied is forced back on him, as the North Koreans need him to teach their intelligence agents how to blend into Japanese society. At the same time, they despise him for his experiences abroad, which mark him as someone who will never belong in the totalitarian state. Conversely, when Serk makes it out of North Korea, Ji-hoon looks down on him for identifying as Japanese, forcing Serk to once more adopt his actual ethnicity. Throughout the novel, every country that Serk has been in has excluded him and attempted to revise his identity. In the last chapter, Roger notes the difficulty in determining Serk’s citizenship status, but the question is rendered moot by Serk’s new identity as a dementia patient. As Louisa concludes, “[H]e’s going to solve this problem…by not moving” (446). Louisa’s comment emphasizes that Serk’s only remaining identity is as the last remaining member of his family.

blurred text
blurred text
blurred text

Unlock every key theme and why it matters

Get in-depth breakdowns of the book’s main ideas and how they connect and evolve.

  • Explore how themes develop throughout the text
  • Connect themes to characters, events, and symbols
  • Support essays and discussions with thematic evidence