Donny, Mary Grace, and the Grandma Gang come together for an action-packed summer camp experience. While the children get used to sleep-away camp in the Santa Ynez mountains, they visit ancient Chumash cave paintings and even meet the descendants of their painters, while they develop a healthy bond with nature.
Along the way, Donny, a delightful boy with Down syndrome, and his crime-fighting older sister, Mary Grace, encounter several mysteries that require their special skills. Frogs show up in Mary Grace's camp cabin, and it takes her insight and Donny's courage to solve this mystery. And when the camp is faced with a natural disaster, Mary Grace offers lifesaving help when a camper goes missing.
In all, this is one exciting adventure you do not want to miss.