Like last summer, Reggie and his sister Cindy are going to Camp Green Meadow for two weeks. Last year Reggie had many mishaps, and to make matters worse, he’s afraid that this year more disasters will spoil his time there. However, Cindy tells him they will have a great time at Green Meadow. Will they? They must deal with a black shadow, lost horses, the police, and a mysterious key.
Reggie keeps a careful tally of both the good times and the disasters—but it’s his discovery at the end of camp that is the biggest surprise of all!