One day, Laura receives a new patient, a young girl named Cristina, who has been mute ever since her parents were killed in a car accident. Cristina's traumatized state is due to the car accident that also took her parents' lives, leaving her with a deep psychological scar.
As Laura begins to work with Cristina, she discovers that the girl is not the only child at the center who is struggling with deep-rooted emotional issues. Each child has their unique story of pain and trauma.
Laura quickly develops a bond with Cristina and the other children as they open up to her and confide in her their deepest fears and secrets. She learns that many have experienced abuse, neglect, and abandonment. Their emotional scars are profound and have left them feeling lost and alone.
Determined to help them heal, Laura employs various therapeutic techniques to help them process their trauma and begin the journey of recovery. Through art therapy, music therapy, and group sessions, the children start expressing their pent-up emotions and slowly rebuild their trust in the world.
Throughout the film, it is revealed that Laura herself is not immune to emotional struggles. She carries her personal traumas and anxieties, stemming from her childhood, which she is confronted with as she engages with the children.
As she immerses herself in the lives of the children and their healing process, Laura begins to form strong bonds with them. Their stories touch her deeply, and she becomes determined to help them find happiness and hope for the future.
However, the center's director, Simón, grows concerned about Laura's intense involvement with the children and her unconventional approach to therapy. He believes it may be harmful rather than beneficial. Laura becomes frustrated by his skepticism and clashing methodologies, and the tension between them escalates.
In a pivotal scene, Cristina decides to confront her suppressed grief by finally speaking about the car accident and the loss of her parents. Her act of courage inspires the other children to face their own demons, resulting in a powerful breakthrough.
As the children progress on their healing journey, they begin to form deep friendships and support each other through their shared experiences. Laura witnesses their transformation and realizes the positive impact she has made in their lives.
However, the film takes a dark turn when Simón insists on administering electroshock therapy to one of the children, claiming it's the only effective way to cure them. Laura vehemently opposes this treatment, fearing its potential harm on the children.
In a climatic confrontation, Laura exposes the center's unethical practices to the authorities, leading to Simón's arrest. The center is shut down, and the children are placed in more suitable care facilities.
In the aftermath, Laura reflects on the impact she has had on the children and the lessons she has learned from them. "Children" ultimately serves as a powerful commentary on the resilience and strength of children who have faced immense trauma and the crucial role of empathy and understanding in helping them heal.