The Lost Daughter (2021) Plot Summary & Ending Explained

While on a vacation in the scenic landscape of Greece, specifically at Kyopeli, the story unfolds around Leda Caruso, portrayed by Olivia Colman, a middle-aged college professor renowned for her translating prowess. During her time there, she encounters Nina, played by Dakota Johnson, a young mother whose three-year-old daughter, Elena, has briefly gone missing on the beach. In a remarkable moment of serendipity, Leda discovers Elena, who had merely wandered off to play in a secluded spot, and promptly returns her to a visibly exhausted Nina. This encounter allows for a glimpse into Nina’s turmoil as she articulates her despair and fatigue. On top of everything, Elena is inconsolable over the loss of her favoured doll, a doll that Leda has secretly taken for reasons shrouded in her personal conflict.

Nina, noted for her striking appearance, finds herself repeatedly pursued by young admirers who share the island. This attention brings to light her struggles as a mother but also reflects on the societal pressures placed upon women. The narrative shifts through compelling flashbacks that reveal a parallel struggle faced by a younger version of Leda, who grapples with her own challenges as a parent to her daughters, Bianca and Martha, played by Robyn Elwell and Ellie Mae Blake respectively. During their childhood, Leda often found herself overwhelmed, dealing with Bianca’s rebellious temperament and Martha’s spirited nature, both of whom frequently went missing, feeding her growing frustration.

As the story unfolds, we see Leda’s significant other, Joe, illustrated by Jack Farthing, rendering little support, fully absorbed in his own career. This lack of assistance drives Leda into further isolation. The film introduces an intriguing scene where Leda encounters two hikers, Female Hiker, played by Alba Rohrwacher, and her male counterpart, who both epitomize a carefree lifestyle, having detached themselves from familial obligations in search of adventure.

The heart-wrenching dichotomy of Leda’s past as a mother and her current observations of Nina and Elena urges her to reflect on her own decisions. The arrival of Nina's husband, Toni, portrayed by Oliver Jackson-Cohen, alongside his dominating sister-in-law, Callisto or “Callie”, played by Dagmara Dominczyk, adds another layer of complexity as Nina struggles with the weight of their expectations while also coping with her own feeling of being overwhelmed.

In a pivotal night filled with tension, Leda shares a meal with Lyle, the hotel caretaker played by Ed Harris, who seemingly recognizes the doll she has taken but chooses not to address it. Striking revelations and tensions come to light when Leda learns of Nina's affair with Will, brought to life by Paul Mescal, highlighting Nina’s desperate search for autonomy under Toni’s controlling nature.

An emotional exchange occurs when Leda gifts Nina a hatpin as a gesture of kindness while inadvertently stirring a deeper conversation about her own past. Leda opens up about her feelings of abandonment when she left her children for three years, siding an affair with a fellow professor. In an act of vulnerability, she expresses a bittersweet liberation, stating that the separation felt "amazing," a moment that reveals the complexities of motherhood.

However, as the narrative crescendos, the tension between Leda and Nina culminates as Leda admits her shortcomings as a mother, revealing her selfish impulses and offering the coveted doll back—a decision that ignites a furious reaction from Nina. In an act of desperation, Nina confronts Leda and injures her with the hatpin, leading Leda to a place of both physical and emotional turmoil.

The self-exploration leads Leda to leave the resort in distress; however, her journey takes an unexpected turn as she loses control of her vehicle and crashes, collapsing on the beach. Here, Leda experiences a moment of awakening, discovering herself lying on the sand as the day breaks. Her poignant reconnect with her daughters, Bianca and Martha, brings a wave of relief as they express their concerns, while Leda, with newfound clarity, peels an orange—a symbol reconnecting her with the nurturing moments of her past, reminiscent of her time as a mother. In this rich tapestry of emotional exploration, the film unearths the intricate layers of motherhood, identity, and the pursuit of self amid familial expectations.

The Lost Daughter leaves its ending open to interpretation, focusing on the complex journey of its main character, Leda. After being stabbed by Nina in a moment of violent confrontation, Leda is found wounded but still alive, as evidenced by her attempts to drive herself to the airport, only to crash her car and collapse on the beach. She wakes up the next morning clutching her phone and an orange— a symbol of her childhood and a motif throughout the film. When she talks to her daughter Bianca, she insists she is alive, and her tone suggests a sense of acceptance or at least a peaceful detachment from her previous struggles. The orange, which she begins peeling in her final moments, evokes memories of her childhood and her attempts to bring order to chaos—a metaphor for her desire to find harmony within herself amid her tumultuous feelings about motherhood. Some viewers interpret this scene as evidence that Leda is still alive and has possibly found some form of peace or redemption. Others believe the orange's presence and her physical wounds symbolize her death—perhaps she succumbed to her injuries off-screen, and the act of calling her daughter is a final attempt at connection from beyond. The film’s ambiguous conclusion leaves the question of her fate deliberately open, emphasizing themes of self-acceptance, the enduring scars of motherhood, and the internal conflicts that define her life. In the end, whether alive or dead, Leda’s expression of peace or finality suggests she has come to terms with her identity—both as a mother and as a woman—leaving viewers to decide if her journey is one of survival or release.