As a young teacher on Martha's Vineyard, Mary Lambert feels restless and adrift. So when a league of missionaries invite her to travel abroad, she knows it's a once-in-a-lifetime opportunity. Paris is home to a pioneering deaf school where she could meet its visionary instructors Jean Massieu and Laurent Clerc--and bring back their methods to America. But the endeavor comes at a cost: The missionaries' plan to "save" deaf children is questionable...

Three years after being kidnapped as a "live specimen" in a cruel experiment to determine the cause of her deafness, Mary Lambert has a grown weary of domestic life on Martha's Vineyard, and even of her once-beloved writing. So when an old acquaintance summons her to an isolated manor house outside Boston to teach a young deaf girl to communicate, Mary agrees. But can a child of eight with no prior language be taught? And is Mary up to the task?...

It is 1805 and Mary Lambert has always felt safe among the deaf community of Chilmark on Martha's Vineyard where practically everyone communicates in a shared sign language, but recent events have shattered her life; her brother George has died, land disputes between English settlers and the Wampanoag people are becoming increasingly bitter, and a "scientist" determined to discover the origins of the islands' widespread deafness has decided she makes...