Lottie dreams of becoming the heroine of the adventures of one of those many books that she reads in the evenings. As, for example, in “The Mystery of the Severed Leg” or in “The Riddle of the Dead Moth.” But her life is boring... School, an annoying younger brother and a house where she is ashamed to invite friends. But everything changes when Lottie meets a new girl named Sophia at school camp. This girl lives in a world of mystery and danger and desperately needs Lottie's help. Sofia wants to find her mother, who is hidden by Mr. Pinhead. When the girls take on the search for Sofia's mother, Lottie finally learns what it means to be a true heroine. It turns out that when real bandits are chasing you, you have to rely only on your own resourcefulness and courage!