As Henni from the author’s Stella Street series grows up, she meets Leo, a thirteen-year-old boy from Berlin. They engage in a series of emails trying to solve the mystery of a German family's disappearance. Topical issues such as racism are part of these characters’ email exchanges with insights in both countries’ cultural traditions.

1. Cross Cultural Relations
2. Friendship
3. Language
4. Racism
5. Refugees