On a summer's day in 1596, a young girl in Stratford-upon-Avon takes to her bed with a sudden fever. Her twin brother, Hamnet, searches everywhere for help. Why is nobody at home?Their mother, Agnes, is over a mile away, in the garden where she grows medicinal herbs. Their father is working in London.Neither parent knows that Hamnet will not survive the week.Hamnet tells the powerful story of Agnes and Will, and of the son whose life has been all but forgotten, but who inspired one of the greatest plays ever written.