Abandoned by his mother in an Acadia National Park campground, Jack tries to make his way back to Boston before anyone figures out what is going on, with only a small toy elephant for company.

When high school student Clay Jenkins receives a box in the mail containing thirteen cassette tapes recorded by his classmate Hannah, who committed suicide, he spends a bewildering and heartbreaking night crisscrossing their town, listening to Hannah's voice recounting the events leading up to her death.