The Parsons sisters are all loved up.
Sarah is living in Sydney with Josh and their cat, Domino, but is anxious about her fast-approaching fortieth birthday.
And Cat is still living in London with her flatmate, Jane, but is in a long-distance relationship with Jean-Luc, her childhood sweetheart and recently re-discovered love.
One of the sisters receives a surprise wedding proposal – it’s a yes! – and everyone heads off to Tuscany for a destination wedding.