The story describes the life of a girl, Pickosa, who dreams of becoming a photographer but ended up living in a boarding school. There, she met some friends like Jerusha and Calvin and some foes like Stanley and Melissa. Then, began the adventures of Little Pickosa; she got three mysteries to solve. While solving them, she got used to the threat of detention by professors and finally met Becky, the mastermind. Ultimately, how did Pickosa and her friends get rid of all the difficulties? Read this interesting book to find that out.