After their flight from Finland is delayed, strangers Josh and Fola end up getting drunk and sleeping together, unbeknownst to their partners back home. When Josh gets home the next day, he is shocked to discover that Fola is his new neighbour.
After Josh and Fola are reunited with their respective partners, things get complicated when Fola’s husband Zack offers his new neighbours an invitation to their house-warming party. Josh’s girlfriend Esther happily accepts, leaving Josh extremely stressed.
After the awkwardness of the house-warming party, Fola confronts Zack over their non-existent sex life. Fola heads over to see Josh, each realising that there might be more to their relationship than just a one-night stand.
After another aborted attempt at sex with Fola, Zack impulsively buys some Viagra at the chemists and bumps into Esther. Their prescriptions get mixed up, to Zack's embarrassment.
Reeling from the events at her school reunion, Esther bares her soul to her boss. Realising that she needs to make changes, she also makes a decision about her relationship with Josh.
Josh gets into an argument with his Dad at the family meal. Meanwhile across the road Zack decides that it’s time to confront Fola and tell her that he knows about her and Josh.
After discovering a family secret, Josh decides to make an announcement about his and Esther’s future. Meanwhile Fola is left reeling from her argument with Zack.
Josh bumps into Zack and learns that his father has died, but as Fola has temporarily moved out she doesn’t know. As Zack heads off to the funeral, Josh calls Fola.
Caught between the two women that he loves, Josh asks Nina for some sisterly advice. Josh decides it’s time to tell Fola how he really feels about her.
As the events of the party spiral out of control both Josh and Fola risk their relationships for each other, only for Josh to realise that Fola might not have been entirely honest
After the adrenaline of their affair, Josh is keen to take his relationship with Fola to the next level. But Fola wants to take things slowly – not exactly Josh’s speed.
Fola has a surprise in store for Josh, and Zack’s date with Claire takes an unusual turn. Meanwhile, Esther and Lars’s new relationship reaches a moment of reckoning.
With everyone gathered under one roof, the stage is set for some big revelations - and an unexpected guest takes the night in a new direction once more.