2004. Serge, Rosie and Daniel are enjoying their final weeks of university. They are young, inseparable and full of optimism.
Fifteen years later, they are guests at a lavish four-day wedding in Provence - and no longer friends.
Life has not turned out quite as planned since their heady days at Oxford. Film-maker Serge is winning awards, but hiding a huge debt and a fractured relationship. Behind Rosie's social ease, she is heartbroken. And with Daniel's fame has come spiralling anxiety.
Now, with four days of organised fun ahead, all three are armed with their best conversation and brightest smile. At least everyone is following the same script: do not bring up the past. But as the Champagne flows, appearances slip and true feelings emerge.
