Synopsis by Mark Deming
A precocious girl turns sleuth to recover a missing diary and uncovers more than she bargained for in this family-friendly comedy-drama. Eleven-year-old Paula (Thelma Heintzelmann) is a smart girl who has been forced to be more self-reliant than she'd wish thanks to the busy lives of her folks. Paula's most prized possession is her diary, in which she spins tales from her rich fantasy life about romantic adventures with a handsome young hero. Paula runs afoul of a pair of youthful thieves who take a knife to her backpack and make off with its contents, including her diary. Tobi (Paul Vincent de Wall), one of Paula's classmates who has a secret infatuation with her, hears about the missing diary, and he offers to help her find it. Before long, Paula and Tobi are playing detective on a grander scale than expected, and they buy more time to search for the diary by sending her younger sister Jenny (Constanze Spranger) to summer camp in Paula's place. However, when Paula and Tobi learn the truth about the thieves, they find they've uncovered a crime ring with ties to trafficking in kidnapped children. Paulas Geheimnis (Paula's Secret) also stars Albert Berisa, Claudia Michelsen and Juide Girisken.