Kerry Casey is still reeling from the bombshell that her lover, undercover cop Vinny Burns, has gone missing in Spain. She's pregnant with his baby and will do anything to find him. One night, driving along a country road, Kerry and her Uncle Danny are ambushed by gunmen. In the confusion that follows, shots are fired and two men are murdered. Kerry and Danny can only look on as the bodies are dragged from their assailant's car and placed in their own. The police arrive in minutes. With cocaine, dead bodies and guns in the car, it looks like an open-and-shut case.

Jane, Carly and Rose Savage are savage by name, savage by nature. Having lost their mum too young, and with a bedridden father too ill to work, the sisters learnt early to stand on their own two feet. The family's flat in the rough streets of Glasgow's Haghill is their fortress, but when Carly's ex-boyfriend Cole Alexander is released from prison, trouble soon comes knocking at their door. The Alexanders have beef with the Savages, so the girls call for back up in the shape of their uncle Eddie and his two gorgeous but dangerous sons, Harry and Dean.

Kerry Casey thought she'd made a life away from the dirty dealings of her gangster family. Her father wanted to make them legit - her brother Mickey had other ideas, and now it's got him killed. When Mickey's funeral turns into a bloodbath at the hands of a group of anonymous shooters and Kerry's mother is killed in the crossfire, Kerry finds herself at the head of the Casey family and desperate for revenge.

Billie Carlson left the police force under a cloud. Once a promising young officer, she now works as a private investigator, rooting out insurance scams and spying on cheating spouses. One morning a distraught young woman comes into her office saying that her baby has been stolen. Her story seems unbelievable, yet something about her makes Billie want to help - Billie knows what it's like to lose someone too. To get to the bottom of the case, Billie must rattle some dangerous cages and rely on old police friends for inside help. 

After the brutal gangland murder of her husband Terry, Tracey Tempest just wants to move on. She’ll never get over Terry’s betrayal, but she’s determined his shady past won’t spoil life for her and her beloved boys Ricky and Jamie. Max Hardcastle just wants a quiet life and to maybe see how things go between him and Tracey. He knows she’s been hurt in the past, but he’s nothing like Terry and he’ll do anything to keep Tracey happy and safe. But some people have other ideas.