The Clementine Complex

Gary Thorn, a 30-year-old legal assistant at a solicitors' firm in Peckham, south London, lives a solitary life in a sparse one-bedroom flat on a housing estate. His only close friend is his elderly neighbor Grace, a former IT worker with a deteriorating hip and an aging sheepdog named Lassoo. Gary fills his lonely days with vivid daydreams to inject optimism into an otherwise unremarkable existence.

About 10 days before the novel's main events, Gary meets Brendan Jones, a private investigator from Cityside Investigations, for a drink at the Grove Tavern in Camberwell. Brendan seems uncharacteristically nervous about a big case he was pulled from, saying the people involved are dangerous. He leaves early, slipping a Post-it note with his personal phone number into Gary's coat pocket. After Brendan departs, Gary strikes up a conversation with a pretty, dark-haired woman at the bar. They spend hours talking, and Gary is enchanted. When he goes for a final round, she vanishes, leaving behind a hardback novel called The Clementine Complex with an encouraging note inside. Gary never learns her name and begins calling her "Clementine."

The next morning, two men identifying themselves as detectives from Peckham's Criminal Investigation Department (CID) visit Gary's flat and tell him Brendan has been found dead. They question him about the evening, ask whether Brendan gave him anything, and leave without providing contact cards. Grace searches online and finds no police officers by their names. Suspecting the men are imposters, Gary drives to the Grange estate in Walworth, where Clementine said she lived. While parked, he has an awkward encounter with a nosy man in a boiler suit, a mobile mechanic who questions Gary's presence. He then witnesses a tall, bald man throw a bicycle from a second-floor walkway, stamp on it, and drive off. Clementine appears, visibly distressed. Gary asks her to confirm his alibi, but she refuses in a panic, telling him never to come looking for her again.

Back home, Gary discovers a USB flash drive shaped like a corncob in his coat pocket, apparently planted by Brendan. The drive is password-protected, and Grace cannot crack it. Gary attends Peckham Police Station on behalf of his client Wayne Moore, a coffee shop owner arrested on fabricated drug charges. He asks Detective Constable Bailey about the Brendan Jones case and is told no such investigation exists. Wayne tells Gary the drugs were planted by corrupt officers from the Lewisham Serious Crime Squad to intimidate his father, Derek Moore, a retired detective who once agreed to discuss police corruption publicly. Gary emails Brendan's office and receives a reply from John McCoy, the owner of Cityside Investigations, claiming Brendan is working away.

The narrative shifts to Emily, a 25-year-old woman living on the Grange estate, who reveals herself as the woman Gary calls Clementine. She recounts a difficult upbringing near Brighton under a controlling father, and how she left home at 18 to work at a restaurant managed by Tommy Briggs, a domineering man who became her boyfriend and gradually took control of her life. After the restaurant was destroyed by arson following a botched drug deal, they relocated to south London, where Tommy began working for Cityside under McCoy. Emily occasionally helped with surveillance and honeytrap operations, seduction-based stings designed to gather compromising evidence against targets. She reveals that the night she met Gary, she was surveilling Brendan on Tommy's orders. She stayed talking to Gary because she genuinely enjoyed his company, a decision that enraged Tommy.

Bailey visits Gary with devastating news: Brendan has been found stabbed to death behind a warehouse. Shortly after, McCoy and Tommy arrive at Gary's flat. Tommy, the bald man from the estate, is Emily's boyfriend. McCoy demands the corncob dongle and threatens that Grace and Emily could suffer if Gary involves the police.

Gary retrieves the dongle from Lassoo's excrement during a walk. He and Grace crack the password using the phone number from Brendan's Post-it note. The drive contains Brendan's statement exposing corruption within the south London police and Cityside: planted evidence, false statements, witness intimidation, and protection of drug dealers. Gary recognizes a case involving Wayne's father and discovers that one of the fake detectives is actually Detective Inspector Peterson of the Lewisham Serious Crime Squad. He hides the dongle beneath the plinth of a dismantled seesaw in the estate's play area.

Emily contacts Gary and tells him she has left Tommy with no money or phone. Gary invites her to stay at his flat. They drive to Brighton so Emily can ask her estranged father for help, but he is cruel and dismissive. They share their first kiss and grow closer. Grace, meanwhile, reveals her own hidden grief: She briefly left her seven-year-old granddaughter Lizzie alone in the flat years earlier, and Lizzie followed Lassoo to the play area, where the seesaw struck her and severely broke her jaw. Grace's daughter Mary cut off all contact, leaving Grace in guilt and isolation.

Back in London, Gary is confronted at the police station by the same two imposters, who now identify themselves as Peterson and Detective Rowlett. They show him photographs of a knife he finds vaguely familiar but cannot place. Their only interest is the dongle. When Gary returns home and finds Emily's belongings gone, he fears McCoy has taken her. At McCoy's office, McCoy reveals that Tommy planted listening devices in Gary's flat and overheard Gary discussing the dongle's hiding place, meaning Emily did not betray him. Gary negotiates: He will hand over the dongle in exchange for dropping the charges against Wayne's father and the return of a steak knife from the Grove Tavern that Emily collected for Cityside's fingerprint archive, a knife matching the murder weapon that could be used to frame him. He takes McCoy's gun, which he suspects is fake, and leaves.

At the exchange in the play area, Tommy hands over the knife and retrieves the dongle. McCoy takes back the gun and pulls the trigger at Gary's face, but it plays "Happy Birthday," confirming it is a novelty item. Armed police led by Detective Sergeant Marks swoop in and arrest McCoy and Peterson. Marks is revealed to be the boiler-suited mechanic from the Grange estate, an undercover officer from Scotland Yard's anti-corruption unit.

Emily's chapter reveals that Tommy abducted her and locked her in the basement of Brendan's empty house. Gary deduces her location from cherry blossom petals on Tommy's boots, breaks in, and frees her. Tommy blocks their escape and casually admits to killing Brendan (284). A violent confrontation ensues: Tommy injures Emily and pins Gary down. Emily strikes Tommy with a metal bar, knocking him unconscious. Tommy regains consciousness holding a real gun and aims at Emily. Gary throws himself on top of her. Tommy fires, hitting Emily in the hip, the bullet's force reduced by The Clementine Complex in her messenger bag. Tommy then turns the gun on himself. Armed police arrive moments later.

A postscript set six months later reveals that 11 officers and three Cityside staff await trial, with McCoy and Peterson expected to receive minimum sentences of 20 years. Emily faces no charges. Gary, Emily, Grace, and Lassoo visit Brighton and sit on Emily's favorite bench. Emily reveals her father has died and left the hotel to her mother, who offers Emily the chance to run it. She proposes that Gary and Grace move to Brighton, with Grace handling the hotel's IT and living closer to Mary and her granddaughter in nearby Lewes. Gary hesitates, but both women press him. The novel ends on a hopeful note, with the three companions and Lassoo together by the sea.