One of Their Own (Una de los suyos)

An undercover agent infiltrates a powerful criminal clan and becomes trapped between loyalty to her mission and a dangerous attraction to her enemies, in a game of power, desire, and betrayal that threatens to destroy them all.

In the shadows of a city ruled by corruption, the Fog Clan — led with an iron fist by Eiji Jo — dominates its territory through a network of fragile alliances. Around him move the key players in a dangerous game: Leiza, an undercover cop determined to gather evidence to bring Eiji down; Mia, Eiji’s childhood friend and loyal secretary, who dreams of escaping with Enzo, another undercover agent known as “Fox.” Eiji, hardened by a past trauma after witnessing his father execute a man before his eyes, has grown into a cold, calculating mind shaped by violence and control.

The city’s fragile balance collapses when Axel Lynx, a charismatic music producer, launches a plan to frame Eiji for a bombing at his own property, the Hotel Jo. On the night Axel receives a major award, the hotel explodes, killing dozens. Eiji is arrested and later released for lack of evidence — but the message is clear: someone wants him destroyed.

Betrayals begin to surface. Mia discovers recordings proving that Leiza is the undercover mole, but she destroys them, overwhelmed by the moral and emotional chaos of their situation. Leiza is captured by Axel and, under pressure, enters a precarious pact with Eiji involving a hostage exchange designed to preserve a tense peace. Under this deal, Leiza will stay with Axel, while Noah — Axel’s sister — is placed under the custody of the Fog Clan. But Noah’s plan is entirely different: to seduce Vincent, Eiji’s right-hand man and lover, as part of her scheme to avenge the death of her father at the hands of Eiji’s father.

Amid growing suspicion and tension, Mia drifts further from Eiji. When Enzo is brutally murdered in an attack linked to Rich, a child trafficker tied to the clan, Mia is shattered.

Six months later, the balance is gone. Eiji has become more ruthless; Vincent, increasingly disgusted, maintains his relationship with Noah; and Leiza, now under Axel’s influence, is caught between her duty as a police officer and her attraction to him. Noah learns that Eiji killed his own abusive father, and her thirst for revenge begins to waver. Meanwhile, Vincent decides to act alone: he plans to kill Rich to avenge both the children exploited by him and his own years of humiliation and abuse. To carry out his mission without Eiji’s interference, he restrains him and convinces Leiza to join the assault on Rich’s stronghold.

The operation turns into a deadly ambush until Axel, Noah, and Eiji burst in to save them. Violence escalates into a brutal climax on the top floor: Eiji kills Rich, and Mia, broken by Enzo’s death and years of submission to the Clan, fatally stabs Noah, wounds Eiji, and kills Vincent. Leiza reacts instantly, killing Mia, while Axel watches as everything he loves falls apart. The police storm in and arrest Eiji for Rich’s murder.

In a somber epilogue, Leiza attends the funerals of Vincent, Mia, and Noah. She receives official honors — her mission is accomplished, Eiji is behind bars — yet she feels hollow. Axel erases his past and convinces her to stay with him, at least for now. In prison, Eiji and Leiza share a final farewell, filled with reproach and affection, before he receives a new and mysterious offer — another descent into the game of power.

RELEVANT INFORMATION: Rose L. McCarney is the pen name of one of Spain’s most promising emerging authors of romantic and dark romance young adult fiction.

One of Their Own is her debut novel — a crime thriller infused with romance, where power, desire, and betrayal intertwine between criminal syndicates and undercover cops. With charismatic and vividly drawn characters, the story blends action, sensuality, and constant twists in an emotionally charged and dramatic narrative, perfectly suited for a fast-paced audiovisual adaptation.

AUDIOVISUAL POTENTIAL: TV Series, Miniseries, Film, TV Film

AVAILABLE LANGUAGES: Spanish