After falling head over heels for a sheep-shearing New Zealander, Lliwen Roberts is fighting for the right to marry the man of her dreams back home in Llanuwchllyn. But as the Government tries to cut the number of immigrants to Britain, Gareth MacRae has been sent back to the other side of the world. In the first programme of the series, Y Byd ar Bedwar follows Lliwen's battle to bring her fiancé home to Wales for their wedding.