Un intervenant en crise et moralement compromis s'attaque à une série de quarts de nuit à Liverpool, tout en essayant de garder la tête hors de l'eau dans sa vie personnelle et professionnelle.
Il raconte l'histoire de Lisa qui assiste à un cataclysme sur le quai 7 d'une gare et qui trouve dans sa mémoire un lien entre sa propre vie et l'événement dont elle vient d'être témoin.
Une série d'événements chaotiques met à l'épreuve l'amitié qui lie Maggie et Eddie depuis dix ans. Le trouble bipolaire de Maggie faisant son retour, Eddie commence à se demander si cette amitié est vraiment dans leur intérêt.
Simon Porter, brancardier enthousiaste, arrive pour son premier jour, convaincu qu'il s'agit de la première étape pour devenir médecin, mais son réveil est brutal aux mains de ses nouveaux mentors brancardiers, Frankie et Tillman.
Several months later, Charlie fatefully rummages through a charity bin and finds what looks like a perfume bottle - but is actually a container full of Novichok.
Tracy, whose life had just begun to revert to normal, is devastated, and the team race to work out what has been missed, and how to make Salisbury safe again.
Police response officer Chris is struggling to keep a grip on his mental health and marriage when he is offered a path to redemption in the form of a young heroin addict.
Chris must juggle handling rookie police officer Rachel while also tracking down Casey, after Carl threatens his family. Casey puts her trust in a friend to hide her from Carl
Chris plans to hand the drugs in, until Carl makes him an offer that he cannot refuse. Rachel strikes a deal with Mullen, but Chris' behaviour makes her feel conflicted.
Chris is forced to work for a major drug dealer to return the drugs stolen by Casey. When Rachel needs his help urgently, Chris must decide where his loyalties truly lie.
Chris is trying to get better and go straight, but when DCI Barnes tricks him into doing a dodgy car stop, he is drawn into a drug war between two of Liverpool's top dealers.
In accepting a new flat from Franny, Chris becomes fully corrupt. His first job, to deliver Casey. But will Chris cross the line and hand Casey over to impress his new boss?
