Tesa can see that her friend Víctor is sad and lonely during break. She has seen how some of their classmates look over at him from a distance and laugh and make unpleasant comments about him... What can Tesa do in this situation? Should she worry about what is happening or would it just be better to ignore it? Will Tesa be able to help Víctor? Bullying at school is firmly on the agenda in conversations, the news, and also in school corridors and classrooms and, of course, online. However, knowing how to react and bring it to the attention of others is not always easy for young children. This book is a simple story about how to prevent, detect and react in situations where children are suffering as a result of their interpersonal relationships. It has a likeable and compassionate protagonist and clear, simple and entertaining language.