Two men are trapped in an isolated lighthouse, cut off from the outside world. As a freak storm rages for months and getting help seems impossible, a terrible tragedy hits, leaving them fighting to stay sane in a nightmarish situation.

After Madlen's sentencing, Faith vows to find William's killer, but first she must contend with the other crises in her life. Evan's approaching early release brings conflicting emotions for the family, and DI Williams shares shocking new evidence with Faith.

Eighteen months after Evan's sudden return, Faith is still in debt to criminal kingpin Gael Reardon, while Evan languishes in prison. When the body of local farmer William Vaughan is found shot in the chest, Faith rushes to help his wife, Madlen, who has been arrested for his murder.

Faith warns against letting Madlen testify, but when Faith is called away for a family emergency, Cerys is forced to put Madlen on the stand. As the trial climaxes, Faith tries to keep it together while DI Breeze continues his campaign against them.

Evan is officially filed as a missing person, but Faith decides not to tell the police about the fake ID and wig she found in his things. After learning that their law business is heavily in debt, Faith represents reformed criminal Steve in a custody battle.

After the police arrive to investigate the break-in at her house, Faith confronts her colleague Cerys, who leads Faith to Dr. Alpay, a dentist involved with the Glynn family. Faith also helps an elderly man whose landlord wants him evicted.

While on maternity leave, Faith Howells spends a night out drinking with friends while her husband, Evan, takes care of their kids. The next morning, Evan leaves for work but never arrives, forcing Faith to deal with the clients at their law firm.

When the police find Evan's car by the docks, a known suicide spot, Williams brings Faith back into the station and locks her in a cell overnight. The next morning, Cerys represents Faith as Williams grills Faith about her relationship with Steve.

Consummate con man Roy Courtnay has set his sights on his latest mark: the recently widowed Betty McLeish, worth millions. But this time, what should have been a simple swindle escalates into a cat-and-mouse game with the ultimate stakes.

Career con artist Roy Courtnay can hardly believe his luck when he meets well-to-do widow Betty McLeish online. As Betty opens her home and life to him, Roy is surprised to find himself caring about her, turning what should be a cut-and-dry swindle into the most treacherous tightrope walk of his life