A book collector stumbles across a series of diaries that chronicle an alien visitation against the backdrop of the American Revolution. ---------A widowed book store owner, Colin Brayton, receives an old diary in the mail written by fourteen-year-old Kate Dibble that hints of something otherworldly happening during the American Revolution. A mysterious elderly stranger shows up at the bookstore offers Colin the job of appraising old books at a desolate colonial plantation.

While evaluating the books at the plantation, Colin stumbles across more diaries written by Kate Dibble that peels back layers of extraterrestrial activities.

Colin attempts to navigate a delicate balance between solving the mystery of the diary and simmering tensions with the beautiful, but aloof caretaker, Madeline Prentice. The strained relationship reaches a boiling point as a thunderstorm descends over the desolate property and prevents them from leaving.

A malicious winged being emerges from the storm and demands the presence of The Ancient One in three days. When the diary hints of a buried spaceship, Colin and Maddy must put aside their differences to find the ship for their safety, and solve the mystery of the diary that hints at who The Ancient One is before the being seals their fate.