Set sometime between the French and Indian War and the American Revolutionary War, Wieland details the horrible events that befall Clara Wieland and her brother Theodore's family. Clara and Theodore's father was a German immigrant who founded his own religion; he came to America just before the American Revolution with the conviction to spread his religion to the indigenous people. When he fails at this task, he believes he has also failed his deity. One night, as he worships in his bare, reclusive temple, he seems to spontaneously combust, after which his health slowly deteriorates and he dies. His children inherit his property, which is divided equally between them. Theodore marries their childhood friend, Catharine Pleyel, and they have four children.
Soon, Theodore begins to hear voices and Catharine's brother, Henry Pleyel, begins to hear them, too. Though at first doubtful of the voices that the men claim to hear, Clara also begins to hear a strange voice. The mysterious Carwin appears on the scene, and suggests that the voices may be caused by human mimicry.
