The first episode of "Red Queen" (Reina Roja), titled "A Leap," sets the stage for a gripping psychological thriller that delves into the complex mind of Antonia Scott, a woman with an extraordinary IQ who is haunted by her past and drawn back into the world of crime-solving. The episode begins with a heart-stopping scene where Antonia stands on the edge of a building, contemplating suicide. The tension is palpable as she visualizes different methods of ending her life, only to be interrupted by the arrival of Officer Gutiérrez.

Gutiérrez, a police officer who has fallen from grace after losing his gun and badge privileges, is sent by his mentor to recruit Antonia for a mysterious organization known as the Red Queen. The mentor, who is the supervisor of the organization, believes that Antonia's high IQ and unique skills make her the perfect candidate for a job that could potentially restore Gutiérrez's reputation within the police force.
As the episode unfolds, we are taken on a journey through Antonia's past, revealing glimpses of her life before tragedy struck. She was once a married woman with a child, discussing the meaning of a Swedish word with her husband in a tender moment. The present, however, is far from that idyllic past. Antonia visits her husband in a hospital, where he lies in a coma, a victim of a crime that has left her seeking answers and justice.
Meanwhile, the episode introduces us to Carla, the daughter of millionaire Ramon Ortiz, who is arguing with her father over work-related issues. As she leaves for London, she decides to take her horse with her, setting off a chain of events that will lead to a harrowing encounter. On the way, Carla and her driver encounter a roadblock, forcing them to reroute. Unbeknownst to them, this detour will lead to a deadly confrontation.
The killer, a mysterious figure who seems to be targeting Carla, is relentless in his pursuit. He slits the throat of Carla's driver, assuming he is a guard, and then turns his attention to Carla. She manages to escape for a moment, but not for long. The killer catches up to her, injecting her with an unknown substance, leaving her fate uncertain.
Back at Laura Trueba's house, Antonia and Gutiérrez discover the chilling scene of Alvaro Trueba's murder. Antonia's analytical mind kicks into gear as she deduces that the victim's head was dipped in liquid nitrogen, causing his blood to be slowly extracted from his body. The murder scene is laden with biblical references, suggesting a twisted sense of morality on the part of the killer, who may believe their sins can be washed away through the act of murder.
As Antonia delves deeper into the case, she realizes that the murder did not occur at Laura Trueba's house but that the body was brought there post-mortem. This revelation adds another layer of complexity to the case, as Antonia and Gutiérrez must now track down the original crime scene to uncover more clues.
"A Leap" is a masterful opening to the series, providing a deep dive into the psyche of Antonia Scott while setting the stage for a suspenseful and intricate plot. The episode expertly weaves together the personal struggles of its characters with the larger mystery at hand, creating a compelling narrative that keeps viewers on the edge of their seats. With its atmospheric cinematography, intense performances, and a storyline that twists and turns at every corner, "Red Queen" promises to be a standout series in the thriller genre.