Gangs rule the streets of the rough Gallowburn Estate in Glasgow, but the deepest rivalry of all is between Jamie Gray and his friends, known as the Blood Brothers, and their enemies, the Lawsons. The two gangs clash frequently, but when a phone containing incriminating evidence disappears after a particularly brutal run-in, the stakes are higher than ever. Jamie’s mother Jackie is as hard as nails and is not going to let anyone hurt her boy – even if she has to roll up her sleeves and get stuck in.

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.

Raven, assassin-for-hire, finds her reputation tarnished when a rival steals her contracts out from under her. She goes on the hunt, attempting to track him down before he destroys her name completely. The vultures of the criminal underworld are circling, waiting until she is at her weakest before finishing her off. On top of that, she's being pursued not only by a gang of neo-Nazi meth dealers but a psychotic torturer, who is intent on claiming her magnificent raven feather tattoos as his prize.

Georgie Deacon thinks nothing of it when a gang of girls led by Yasmin, a member of the notorious Marx family, knock at her door and threaten to hurt her daughter—that is until her daughter doesn't return home. Detective Clark Kims ignores Georgie's plea to have the gang of girls brought in for questioning. He insists it is the work of the Kent serial killer, until Georgie realizes that the detective's daughter is part of the gang.

When Toni’s twelfth birthday is marred by a terrible crime, the wicked path of the girls looks set. A decade later, the McVay family aren't the unstoppable force they once were in the Glaswegian criminal underworld but Frankie McVay, the up-and-coming prince, is determined to restore the family to its former glory and the whole family are expected to help. His sister Toni shares her brother’s blood lust but Valerie dreams of a quieter life, and when she meets and falls in love with Seb, as straight as Frankie is bent, as kind as Frankie is wicked, Val sees her way out.

An unassuming Dottie Ellis falls for bad boy Jimmy Carson, who sweeps her off her feet. But after discovering she is pregnant and learning that Jimmy has gone back to his ex-girlfriend Carrie Verne, her happiness falls apart. Heartbroken, Dottie runs home, only to unearth a disturbing family secret that rocks her to the core. She is now faced with an agonizing decision to protect her unborn child. What she does shocks the town. In a moment of solidarity, Carrie makes a promise to Dottie, cementing an unlikely bond between them.

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.

Kenny Bond is finally out of prison after doing a long stretch for killing a copper and is determined to get back to life on the straight and narrow. Kenny’s son Donny might lack his father’s edge but his twin grandsons, Beau and Brett - well, they are Bonds through and through. Like him, they won’t let anyone stand in their way.

When Amy Osbourne’s parents are lost at sea, she is forced to leave her London home and is sent to live with her aunt and uncle at the opposite end of the country. Alardyce House is depressing and dreary, her aunt haughty and cruel. Amy strikes up a friendship with her cousin Edward but his older brother Henry is just as conceited as his mother, and a mutual loathing develops between him and Amy. Struggling in this strange, unwelcoming environment, Amy begins to suspect that something isn’t right at Alardyce House.

Scarlet Drew isn’t to be messed with. As the daughter of a notorious London gangster, she’s got enough street smarts to take on the world. But when the most important person in Scarlet’s life is murdered in cold blood on the East End streets where she grew up, she can only think of one thing - revenge. Scarlet’s aunt, Lily, is fierce, straight-talking and a force to be reckoned with. As head of the family firm and queen of the London underworld, she welcomes her niece into the business and swears to help her get revenge - after all, family comes first.