On an island on the coast of Cornwall, cut off from the mainland by the tides for most of the day, 13 old friends meet at Tregowan Castle for a weekend of revelry. By the next evening, only 12 are still alive. Amongst them is a killer - but who? As a storm traps them on the island and past betrayals and grievances are revealed, nerves fray and friendships begin to fracture. But with no escape and no way of calling for help, it’s only a matter of time before the killer strikes again. And when everyone is keeping secrets, anybody could be the next victim.

Simon Sparks is the man you know from behind the counter at the local Prince Burger (‘hold the gherkin!’), fry shovelling, shelf stacking, hiding away from the world. And Jodie Brook is the single mum you see crossing the street with her son, Zak - always chasing a dream she can’t reach. What if life could be so much more? When Simon and Jodie’s worlds collide, it upends everything they know. But in chaos comes opportunity. And for every person who’s ever doubted them, they find someone who’ll finally believe.

As a barrister, Ingrid Lewis is used to dealing with tricky clients, but no one has ever come close to John Webster. After Ingrid defended Webster against a stalking charge, he then turned on her - following her, ruining her relationship, even destroying her home. Now, Ingrid believes she has finally escaped his clutches. But when one of her colleagues is run down on a busy London road, Ingrid is sure she was the intended victim. And then Webster shows up at her door.

1998. A 16-year-old girl is found dead on school property, dressed in white and posed on a swing. No known cause of death. Four girls know what happened. And until now they’ve kept their silence.

Beth and Tom Hardcastle are the envy of their neighbourhood - they have the perfect marriage, the perfect house, the perfect family. When the police knock on their door one evening, Beth panics. Tom should be back from work by now - what if he’s crashed his car? She fears the worst. But the worst is beyond imagining. As the interrogation begins, Beth will find herself questioning everything she believed about her husband.

Xander Shute - once a wealthy banker, now living on the streets - shelters for the night in an empty Mayfair flat. When he hears the occupants returning home, he scrambles to hide. Trapped in his hiding place, he hears the couple argue and he soon finds himself witnessing a vicious murder. But who was the dead woman, who the police later tell him can't have been there? And why is the man Xander saw her with evading justice?

After losing her job and boyfriend, Jan Hamlin is in desperate need of a fresh start. So she jumps at the chance to rent a secluded cottage on the edge of Coleshaw Woods. Very quickly though, things take a dark turn. At night, Jan hears strange noises and faint taps at the window. Something, or someone, is out there. Jan refuses to be scared off. But whoever is outside isn’t going away, and it soon becomes clear that the nightmare is only just beginning....

A crimewave sweeps through the city and no one is safe. An arson at the docks. A carjacking gone wrong. A murder in a country park. What connects all these crimes without causes, which leave no clues? Detective Inspector Helen Grace faces the rising tide of cases which threatens to drown the city. But each crime is just a piece of a puzzle which is falling into place. And when it becomes clear just how twisted and ingenious this web of crime is, D.I. Grace will realise that it may be impossible to stop it.

Ike Randolph has been out of jail for 15 years, with not so much as a speeding ticket since. But a Black man with cops at the door knows to be afraid. The last thing he expects to hear is that his son Isiah has been murdered, along with Isiah's white husband, Derek. Ike had never fully accepted his son but is devastated by his loss. Derek's father, Buddy Lee, was almost as ashamed of Derek for being gay as Derek was ashamed that his father was a criminal. Buddy Lee still has contacts in the underworld, though...and he wants to know who killed his boy.

Lucy has dreamt of her wedding day for as long as she can remember. And now the day is almost here. Her nearest and dearest are gathered on an idyllic Greek island and she just knows it's going to be perfect. It has to be. But even the best-laid plans can go horribly wrong. Why are her parents behaving so strangely? Why won't the rather odd lady from the airport stop hanging around? Who is the silent stranger her sister brought as a plus-one? And then they find the body. It's going to be a day to remember.

When a woman is murdered in Blackdown village, newsreader Anna Andrews is reluctant to cover the case. Anna’s ex-husband, DCI Jack Harper, is suspicious of her involvement, until he becomes a suspect in his own murder investigation. Someone is lying, and some secrets are worth killing to keep.

Mia Eliot has travelled from London to LA for pilot season. This is her big chance to make it as an actor in Hollywood, and she is ready to do whatever it takes. At an audition she meets Emily, and what starts as a simple favour takes a dark turn when Emily goes missing and Mia is the last person to see her. Then a woman turns up, claiming to be Emily, but she is nothing like Mia remembers. Why would someone pretend to be Emily? Starting to question her own sanity, she goes on a desperate and dangerous search for answers, knowing something is very, very wrong.

Philomena McCarthy has defied the odds and become a promising young officer with the Metropolitan Police despite being the daughter of a notorious London gangster. Called to the scene of a domestic assault, she rescues a young woman, Tempe Brown, the girlfriend of a decorated detective. The incident is hushed up, but Phil has unwittingly made a dangerous enemy with powerful friends. Determined to protect each other, the two women strike up a tentative friendship.

When Kate moves to London after the disappearance of her sister, she’s in need of a friend. A chance meeting leads Kate to Della, a life coach who runs support groups for young women, dubbed by Kate as ‘the Janes’. Della takes a special interest in Kate, and Kate soon finds herself entangled in Della’s life - her house, her family and her husband. It’s only when she realises that she’s in too deep that Della’s veneer begins to crumble and the warnings from ‘the Janes’ begin to come true.

They were meant to be safe on Fleet Ward: psychiatric patients monitored, treated, cared for. But now one of their number is found murdered, and the accusations begin to fly. Was it one of his fellow patients? A member of staff? Or did someone come in from the outside? DC Alice Armitage is methodical, tireless, and she's quickly on the trail of the killer. The only problem is, Alice is a patient too.