When new surgical nurse Mia arrives at the hospital, she quickly turns her charm on married colleagues, Charlotte and Jacob, who can't help but feel unsettled when she unexpectedly moves into the house next door.
To mark 20 years together, Jacob plans a surprise trip to Antwerp for Charlotte; when a third person joins, things take an erotic, dangerous turn; cul-de-sac outcast Alan dusts off his telescope.
Upon her return from Antwerp, Charlotte throws herself into her work; Gossip about the trip spreads throughout the hospital, leading to tension; Mia tries to do a good deed for Alan.
Jacob comes to a heartbreaking realization, while Mia's past finally catches up to her, leading to tumultuous events for everyone.
Relationships are imploding, and the fallout seems to have deadly consequences; Leo is in a race against time to try and uncover who is really behind the deaths at the hospital, while Alan is forced to take drastic actions to protect Mia.
Evie and Pete move to suburbia with the dream of starting a family; but it's not long before Evie's dreams start to take a different shape -- that of her hot new neighbor, Danny.
The electric chemistry between Danny and Evie increases, amusing Becka and horrifying Pete; Danny's moonlighting takes a dangerous turn and Alan's obsession with Becka grows.
The sexual tension between the two couples reaches a boiling point during a weekend away; Alan's obsession with Becka escalates further, with devastating consequences.
An ultimatum from Pete deepens Evie's obsession with Danny; Danny's plan to get Spencer out of his life is thwarted by Pete and Sophie's front page scoop.
Secrets spill out during a violent showdown in the Yorkshire Dales; Evie is more delusional than ever and Pete is at a breaking point; Danny and Becka's relationship might be finally destroyed by the couple next door.