Aine Cahill has escaped her troubled past through her studies. A graduate student researching Henry David Thoreau, Aine has a secret. One that may bring her fame and a guaranteed job.

The notoriously reclusive Thoreau had a companion at his Walden Pond retreat. Aine's aunt Bonnie, a woman ahead of her time in many regards, lived with Thoreau in his small cabin—and Aine has her aunt's diary to prove it.

Aine's dissertation will blow a hole in the legend of Thoreau, but as Aine wanders the wooded Massachusetts land near Walden, she discovers a much darker, and far more dangerous secret. Someone is following her. A young girl who disappears without leaving a trace. Who is this child and what does she want?

The Cahill family, with a long and bloody past of piracy and whaling, has left Aine a legacy. One she doesn't want. When tragedy strikes the town and Aine becomes the prime suspect, she must discover the truth of her "gift," the young girl, and the diary. Is any of it real, or is Aine losing her mind?