Two women. Two eras. One secret that could change everything.

When American nurse Cate Marsi stumbles across an ancient manuscript on holiday in England, she is swept into the story of Catherine Marsini, a 14th-century herbalist accused of witchcraft. Fleeing persecution, Catherine finds refuge in an English priory, where her healing skills-and her growing bond with a gifted physician-ignite both passion and peril. The local parish priest sees illness as God's punishment, and Catherine's compassion as dangerous defiance.

As plague descends and secrets buried within the priory walls come to light, Catherine must risk everything she believes in to save the man she loves. Across centuries, her choices echo forward, binding past and present in a tale of forbidden love, faith, and courage.