From the bestselling author behind the addictive, EMMY and GOLDEN GLOBE-winning HBO series Big Little Lies, comes a cocktail of friendship and modern love - spiked with a little deception. Six responsible adults, two best friends - and one day that changes everything. 'This is a story which begins with a barbecue in the suburbs. . .' By the end of it a lifelong friendship will be in tatters, a marriage on the rocks and an innocent bystander dead. In just one evening six lives will change for ever.