Strike one. Strike two. Strike three. You're out!

Stormy, Cassie, and Gabriella find themselves once more helmet deep in a mystery. This time, it hits close to home plate. Someone is trying to sabotage Cassie's baseball team while they are playing against their rivals for a chance at the championship. Their only clue is a mysterious shadow the team members saw following them. Will the girls figure out who is causing all the hijinks before their third strike? Or will they be out?