Essex and Wales collide when Gavin and Stacey fall in love - bringing their friends, family and baggage with them.
After being phone buddies for months they finally arrange a rendezvous in Leicester Square, with Stacey's best friend Nessa and Gav's pal Smithy coming along for support.
After a huge misunderstanding on the phone, Stacey thinks Gavin has finished with her. He drives to Wales to explain and ends up taking her home with him. Having never been further than Bridgend before, Stacey's trip to Essex is an eye-opening experience that ends with the biggest surprise of all.
After his initial angry reaction to Stacey's news, Uncle Bryn agrees to drive the family to Essex to meet the Shipmans. Pam lays on a cracking spread and the party goes with a bang. Then Gavin and Stacey make an announcement that throws the bonhomie out the window.
The Shipmans drive down to Wales for the wedding fayre. After an eventful trip to church to hear the banns being read, Nessa confides in Stacey her big secret.
Stacey's brother Jason arrives home early, much to Uncle Bryn's horror. Stacey has her hen night and Gavin has two stag nights, the second of which reveals something about Stacey that could jeopardise the whole wedding.
The wedding day has finally arrived, but will they go through with it? Will Uncle Bryn finally admit to what happened on the fishing trip and will Nessa do what she knows she must?
Stacey and Gavin return from honeymoon to a big welcome from both families. Smithy seems none too happy with his best mate, however, and Nessa has a confession to make that throws the whole evening into disarray.
Devastated by the news he's to become a father, Smithy goes AWOL. The boys finally track him down, but can he be persuaded to do the right thing? Stacey is shocked to hear of Gwen's new domestic arrangements as the prospect of living in Essex finally hits her.
Stacey's getting used to being an Essex wife, but it's not as exciting as she'd hoped. She bucks up at the weekend, when it's time for a home visit to Barry. Smithy goes with Nessa for the first scan and they get the first glimpse of their baby.
Mick becomes a minor celebrity for the night, while Stacey and Gavin start house-hunting.Nessa visits Stacey and shows the others a thing or two at the bowling alley, but tensions between the newlyweds come to a head at the end of the night, leaving the embarrassed friends to take solace in some corn on the cobs.
Bryn has arranged a special treat for Gwen's birthday, but things take a surprising turn when an uninvited guest turns up, and Stacey tells Gavin of her big decision.
Gavin is in Essex without his wife, and Stacey is in Barry without her husband. So while Smithy plans a boys' night out, Stacey goes to the bingo. But has living separate lives finally taken its toll on love's young dream?
Stacey returns to Essex to sort out the situation with Gavin, but things are not looking good. Meanwhile in Barry, an unexpected event throws everyone into a panic.
Gavin starts his new job in Cardiff, and Stacey is thrilled to be at home again. Smithy comes to terms with life in Essex without his best mate, while Nessa is adjusting to life in Dave's caravan down in Sully.The weekend brings with it a big reunion, as everyone meets up for the christening of Neil the baby. How will Smithy react to news from Nessa that it is a double celebration, and what will Gavin's answer be to Stacey's request?
Stacey is trying for a new job whilst ensuring that Gavin sticks to his recent promise. Dave is not a happy bunny when Nessa tells him she's taking Neil the baby to Essex to see his dad. Meanwhile, over at the Shipmans' house, Dawn and Pete have joined Pam and Mick for a beer and curry night of huge proportions - at the Billericay house of fun.
Pam and Mick are having second thoughts about the conservatory, whilst Bryn is in his element as he awaits the arrival of his houseguests - all the Essex boys are down for a big night out in Cardiff, and having a sleepover at his! Smithy gets in a state about seeing Nessa after their most recent embarrassing meeting and Stacey makes a worrying discovery. But is telling Gavin the right thing to do?
Gavin is uncomfortable with Gwen and Bryn knowing the ins and outs of his and Stacey's sex life, and Smithy goes beyond the call of friendship by making a staggering suggestion. Pete and Dawn prepare to renewtheir wedding vows and everyone heads to Billericay to help them celebrate. How will Dave react to the bombshell revelation about the curry night in Essex?
It is Bank Holiday Monday, and the Essex contingent arrives for a sunny day out at the beach; even Doris gets her sun dress on.Gavin's heart-to-heart with his dad gives him something more to think about, and a dark cloud looms on the horizon when Dave arrives to find Nessa and Smithy enjoying all the fun of the fair.
Nessa and Dave's wedding is fast approaching, and the preparations are in full swing. Stacey breaks some life-changing news to Gavin, while Bryn and Jason finally put their big secret to bed.Smithy takes care of Neil the baby, and wishes Nessa all the best as she makes her way to the church to marry Dave.
