It's the fall of 1985. The intertwining tales of three 5th grade friends, Chris, Joe and Ted, unfold in the suburban paradise of Palo Alto, as the threat of a mountain lion looms over the community.
10-year-old Ellie is fascinated by nature and birds, she spends her time reading about them. One day, a few miles from school, she goes onto a little island on the Loire River to take a bird book back to the library. It's an island full of birds.