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.

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.

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 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 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. 

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.

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.

New Year's Eve should be a time for celebrating. A chance to spend time with loved ones and look forward to the year ahead. For DSI William Lorimer, however, this New Year's Eve will be one that he will never forget. Called to a house after gunshots are reported, the carnage he finds there will have a powerful impact on his life - leaving him questioning his future with Police Scotland.

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.

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 a light aircraft crash-lands at Machrie airport, Daley and Scott rush to the scene. But it soon becomes clear that both occupants of the plane were dead before take-off.... Meanwhile, tending to his lobster creels, Hamish finds himself in the wrong place at the wrong time, and back at the County Hotel, Annie is beginning to suspect her new boss Ian Macmillan may not be as he first appeared. 

Former soldier. Ex-copper. Current man on the edge. Shunned by his old colleagues, and dividing his time between a dead-end job and the bottom of a whisky bottle, former Police Scotland detective superintendent Bob Hoon’s life is a mess. Then an old face from Hoon’s Special Forces days turns up asking for help: His teenage daughter has been missing for months, the police have drawn a blank, and he needs the kind of help that only Hoon can provide. And besides, Hoon owes him one.

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.

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.