In 1809, teenage genius Thomasina Coverly races ahead of her time, pushing at the edges of mathematics, nature and the human heart with dazzling instinct and dangerous curiosity. In the present day, writer Hannah Jarvis searches for the truth behind a literary mystery, determined to separate fact from fantasy, even as the past begins to blur and shimmer around her. As the years fold into one another, Arcadia becomes something unforgettable: on what it means to be alive, to lo