Detective Superintendent Lorimer's worst nightmare is a serial killer loose in his city. But two serial killers operating at once on the streets of Glasgow is a nightmare come to life. Is there a link between the brutal slaying of prostitutes in the backstreets of the city and the methodical killing of several unconnected businessmen? Lorimer is never one to jump to conclusions but something about these cases just doesn't add up. Each killer has a different MO, but their obsession with murder is equally chilling.

2014: The Commonwealth Games are coming to Glasgow and security is extra tight, particularly after a mysterious bomb explodes in nearby rural Stirlingshire. As the opening ceremony for the Games draws ever closer, the police desperately seek the culprits. But Detective Superintendent Lorimer has other concerns on his mind. One is a beautiful red-haired woman from his past whose husband dies suddenly on his watch.

There's a hit man in Glasgow: unpaid and angry, he's decided to settle his own debts.... Elsewhere in the city, Marianne Brogan can't sleep. She's plagued by a nightmare: someone in the shadows, whispering threats, stalking her every move. To make matters worse, Marianne can't get hold of her brother, Billy. Despite knowing some shady characters from Glasgow's underworld, Billy's always been there for her - until now.

When the body of a red-haired young man is washed up on the shore of the beautiful Isle of Mull, Detective Superintendent Lorimer's tranquil holiday away from the gritty streets of Glasgow is rudely interrupted. The body has been bound with twine in a ghoulishly unnatural position and strongly reminds Lorimer of another murder: a twenty-year-old Glasgow case that he failed to solve as a newly fledged detective constable and which has haunted him ever since.

When an elderly woman is found dead at her home, newly fledged DC Kirsty Wilson is called to the scene. It appears that the woman had a mysterious visitor in the early hours of that morning - someone dressed as a carer but with much darker intentions. It soon becomes obvious that this was not death by natural causes; in fact it was murder.

When Dorothy Guildford is found stabbed to death in her home, all signs point to her husband, Peter. The forensic psychologist is convinced there's more to the case than meets the eye, but Police Scotland are certain they have their man. While DC Kirsty Wilson searches for evidence that will put Peter away for good, she is shocked to discover a link with a vast human-trafficking operation that Detective Superintendent William Lorimer has been investigating for months.

An unpredictable killer is loose on the streets of Glasgow, experimenting with death. Beginning with brute force, the murderer moves on to poison and drowning, greedy for new and better ways to kill. Faced with a string of unconnected victims, DCI Lorimer turns to psychologist and friend Solomon Brightman for his insights. Lorimer is also assigned to review the case of a fatal house fire. His suspicions are raised by shocking omissions in the original investigation.

When the dead body of a man is fished out of Glasgow's River Clyde the morning after an office celebration, it looks like a case of accidental death. An anonymous telephone call and a forensic toxicology test, however, give DCI Lorimer reason to think otherwise. Probing deeper into the life and business of the deceased accountant, Duncan Forbes, a seemingly upright member of the community, Lorimer finds only more unanswered questions.

Eric Chalmers is one of the most popular teachers at Muirpark Secondary School in Glasgow. Gentle and kind, he is the person the students come to when they want to confide in someone. So when precocious teenager Julie Donaldson accuses Chalmers of rape, the school goes into shock. How could a deeply religious family man like Chalmers do anything like that? With some students and teachers supporting Julie and others standing by Chalmers, life at Muirpark is far from harmonious. And then things get much worse.

When Chief Inspector Lorimer returns from his holiday on the island of Mull, he feels a welcome sense of calm. But it doesn't last long. Kelvin FC's new star midfielder is found brutally stabbed to death in his own home, and, with his wife apprehended trying to leave the country, a seemingly straightforward new case begins. But the grisly murder of a referee after a Kelvin match throws light on some dark secrets at the ground.

When his old friend and former colleague is shot dead at his home, Detective Superintendent William Lorimer is devastated. And his problems are only just beginning. It's not long before two further deaths are reported: both victims ex-policemen. It's clear this is a targeted campaign against their own, yet with no other link between the victims to identify the killer, Lorimer's police team are starting to panic. Who will be next? Lorimer knows he must keep his cool if he is to solve the case. 

The Glasgow Orchestra are rehearsing to perform, but little do they know of the sequence of events happening backstage. When George Millar, the orchestra's leader, is brutally murdered in his dressing room, his colleagues are shocked. But the show must go on. Enter DCI Lorimer and psychologist Solomon Brightman to investigate. What they uncover is a series of irrevocably tangled relationships between the orchestra members.

The body of a prostitute is found at Glasgow's Queen Street Station, her hands, pointing towards her feet, placed as if in prayer, a small flower pressed between the palms. Psychologist Solomon Brightman is called to assist DCI Lorimer in the murder hunt, with the hope that his lateral thinking will shine a light on the case from a different angle. But before any conclusions can be drawn, the body of a nurse is discovered at The Grange, a private clinic.

Inspector Daniel Kohi of the Zimbabwean police force returns home one night to find his worst nightmare has been realised. His family dead, his house destroyed and in fear for his life, he is forced to flee the country he loves. Far away in Glasgow, DSI William Lorimer has his hands full. Christmas is approaching, the city is bustling and whilst the homicide rate has been relatively low, something much darker is brewing. Counter-Terrorism have got wind of a plot, here in Lorimer's native city, to carry out an unspeakable atrocity on Christmas Eve. 

When three young women are discovered strangled and mutilated in a Glasgow park, it is up to DCI Lorimer to find their killer. Frustrated by a lack of progress in the investigation, Lorimer is forced to enlist the services of Dr Solomon Brightman, psychologist and criminal profiler. Together they form an uneasy alliance. But when a homeless man is brought in for questioning, the investigation takes a bizarre turn.