Lost and alone on the vast prairies of 18th century America, Boundless McLennan, an escaped convict, chances upon a striking rock monolith. Awed by the teeming herds of buffalo that roam the surrounding grasslands, he becomes fixated with the idea of carving the rock into a giant monument to the prodigious beast.

Against a backdrop of war, disease, and personal tragedy, Boundless struggles to achieve his vision, pitting his fierce will against the implacable rock in an obsessive desire to 'make the world sit up and take notice'.

One man's determination to leave his mark on history begets a haunting, multigenerational saga of ambition, greed, violence, and greatness that is the story of America itself.