In the gloriously hot summer of 1936, a group of people meet at a country house party. Within three years, the country will be engulfed in war, but for now time stands still as they sip champagne on the lawn, engaging in casual flirtations and carefree conversation. Then a shocking death puts an end to their revelry, changing everything in an instant.

For all of them, that summer house party will be a turning point. The mistakes made during that fateful weekend will change their lives for ever.