The 24th Hour

The twenty-fourth installment in the Women's Murder Club series follows four friends in San Francisco: Homicide Sergeant Lindsay Boxer, Assistant District Attorney Yuki Castellano, medical examiner Dr. Claire Washburn, and crime reporter Cindy Thomas as they confront high-stakes cases during a single turbulent week.

Six months before the main narrative, Lindsay interrupts a birthday lunch for Claire at an upscale restaurant called Xe Sogni when a woman screams upstairs. Lindsay finds a young woman nearly naked on the floor, covered in bruises, with finger marks around her neck. A man named Tyler Cates stands half hidden behind a locker, naked from the waist down. Lindsay arrests him for aggravated assault. The victim whispers, "He raped us," and gives her name as Loretta, though her driver's license identifies her as Mary Elena Hayes. The plural pronoun and conflicting names hint at a condition central to the coming trial.

Six months later, the four friends celebrate Cindy's bestselling book on a luxury yacht, where Cindy reveals that Rich Conklin, Lindsay's longtime Homicide partner, has proposed again after she rejected him years earlier. This time she said yes. Their husbands join them unexpectedly: Lindsay's husband Joe Molinari, a former federal agent; Claire's husband Edmund; and Yuki's husband, Homicide Lieutenant Jackson Brady, who is also Lindsay's commanding officer.

Three storylines then launch simultaneously. Yuki prepares for the Cates rape trial, arguing that Cates knew Mary Elena had dissociative identity disorder (DID), a condition in which severe childhood trauma causes the mind to fragment into distinct alternate personalities, and therefore knew she could not consent. Her evidence includes DNA, bruises consistent with violent assault, and Cates's admission that the woman gave him different names. Her second chair, Nick Gaines, worries that if one of Mary Elena's charming alters emerges on the stand, the jury may side with the defense. DA Len "Red Dog" Parisi warns Yuki the case is weak but lets her proceed.

That same day, Lindsay and Conklin respond to the murder of billionaire James Fricke III, shot five times with .40-caliber rounds on Pacific Avenue in a pattern identical to the killing of his wife, former Olympic gymnast Holly Bergen Fricke, six months earlier. Holly's murder yielded no leads despite extensive investigation. Jamie's watch, ring, and Jaguar are missing, just as Holly's jewelry and Bentley were taken. A neighbor witnessed the shooting but could not identify the killer. Brady assigns Lindsay as lead of a joint task force, and Chief Clapper warns that the FBI will take over if they fail.

Meanwhile, FBI section chief Craig Steinmetz recruits Joe to combat a ransomware attack on St. Vartan's Hospital. A hacking group called Apocalypto demands $20 million in cryptocurrency within 48 hours or it will shut down all hospital systems. Joe partners with Bao Wong, the FBI's director of cyberterrorism, and the hospital's incident response firm, Cyber Security Incorporated (CS Inc.), which uses a real-time tracking program to locate Apocalypto's operatives.

At trial, defense attorney Edward Schneider argues that DID is an unproven theory and that his client, a dishwasher with a tenth-grade education, had no way of knowing anything was wrong. Lindsay and Claire testify about the scene. Mary Elena's psychiatrist, Dr. Stuart Aronson, plays a therapy video showing how childhood sexual abuse by her grandfather created her alternate personalities and testifies that one protective alter specifically warned Cates that Mary Elena was "off-limits." The trial implodes when Cates jumps up and shouts that he and Mary Elena were fellow patients at an institution called Brookside Psychiatric. A search of more than 30 institutions named Brookside turns up no records of either person. Judge St. John concludes Cates lied, and Cates eventually pleads guilty to rape and aggravated assault. He is sentenced to 35 years for rape and 15 for aggravated assault, both with the possibility of parole.

Lindsay's investigation of the Fricke household uncovers a web of secrets. House manager Arthur Bevaqua gives her a draft of Jamie's will, which bequeaths millions to his two adult sons, Holly's sister Rae Bergen, and several household staff members. In a locked desk drawer, Lindsay finds love letters revealing Jamie's passionate affairs with cook Patty Delaney and Holly's former assistant Marilyn Stein. Before Jamie's funeral, Rae confirms her own romantic relationship with Jamie and states that Holly knew about his affairs and had lovers of her own.

Joe and Bao's hunt for Apocalypto first leads to a raid on an abandoned house that turns out to harbor a drug operation, not ransomware. The real break comes when CS Inc.'s tracking program identifies a blacklisted signal within San Francisco. Joe recovers a laptop left at a Starbucks and apprehends its owner, Robert "Bob" Nicholson, a coder who served as Apocalypto's ransom negotiator. Disgusted by the hospital attacks, Bob offers to restore St. Vartan's network and expose the organization in exchange for a new identity and FBI protection. Bob delivers, and the hospital is saved. Steinmetz offers Joe a full-time FBI position; after discussing it with Lindsay, Joe accepts.

Claire provides the critical break in the Fricke case: DNA scraped from Jamie's knuckles confirms that his killer is male and shares Fricke family DNA, meaning the killer is a blood relative. A lead on a contract killer with gambling debts linked to Jamie proves to be a dead end.

Lindsay meets twice with Christophe Picard, Rae Bergen's ex-husband, and learns through his social circle that the Bergen and Fricke families practiced open relationships. An anonymous tip warns that Christophe is shielding his son, who has threatened people at school.

The case breaks open when Christophe storms into the Homicide squad room with video footage of Rae's murder. In a recording of a video call between Christophe and Rae, a male figure enters the frame behind her, points a gun at her head, and fires. Lindsay and Conklin fly to Los Angeles and track Brock Picard, Rae and Christophe's son, to Pepperdine University. Brock flees and briefly takes a student hostage inside the campus chapel before releasing her.

In a tense standoff, Lindsay and Conklin disarm themselves to calm Brock, and he confesses. Jamie Fricke, not Christophe, was his biological father. Holly revealed this accidentally during a sexual relationship she initiated with Brock when he was 16, then cut him off entirely. The discovery that his entire identity was built on lies drove him to kill. He shot Holly first, staging the scene as a robbery. Months later, he lured Jamie out and gunned him down. He killed his mother for her lifelong deception. Lindsay connects the DNA evidence: Jamie punched Brock before dying, and as Jamie's biological son, Brock's DNA matched the Fricke family markers. Brock offers his gun to Conklin, then raises it to his own temple and dies by suicide.

In the epilogue, Cindy and Rich marry at the Chapel of Our Lady at the Presidio. Lindsay serves as maid of honor, with Claire and Yuki as bridesmaids. Cindy abandons her prepared vows to speak from the heart, apologizing for years of stubbornness and thanking Rich for waiting. As photos are taken, Cindy holds a secret she plans to share with Rich that night, marking the beginning of their married life together.