After Riley receives a detectives kit from her parents, the girls meet back at the secret tree fort to plan out their final adventure for summer ends. But what they find is beyond belief Secrets, Adventure and a great battle to save the Kingdom Come along with Riley, Casey, Bailey and Sam on an adventure to Cedar Hollow And find out what secrets it holds

Cinnamon is in third grade and just became best friends with Jordan by linking their pinky fingers. Then a new girl moves into their neighborhood and class. Read what happens to make Cinnamon jealous.