It's the fall of 1985. The intertwining tales of three 4th grade friends, Chris, Joe and Shrimp, unfold in the suburban paradise of Palo Alto, as the threat of a killer mountain lion looms over the community. Chris encounters a dead body up close on a trip to Yosemite with his Dad. His classmate Joe, left alone at home, befriends a lonely drifter who introduces him to the world of comic books.

Meanwhile, Shrimp discovers his cat mauled by a mountain lion...and convinces the trio to seek revenge and hunt down the beast. "Yosemite" hopes to create a powerful and nostalgic experience of childhood, while sharing insight into Palo Alto at a time of crucial technological and social change.