Joan is a single mother - beautiful, talented and desired. John is her adored son, her 'Merboy'. Growing up in the West Country, his life is lived outdoors, playing in the creek by their cottage in Devon, swimming, hunting for shells, collecting bits of old boats. On his thirteenth birthday, Joan treats him to a trip to London to buy his first pair of Levi's jeans. Unused to city driving, she takes a wrong turn. The repercussions of that moment's hesitation are devastating... Their story recounts the life-altering effects of that one moment.