Nils and Evi are certain that something is terribly wrong! Their friend Lina, who usually does everything right, is always coming late to school and has no time for detective work anymore. Does this have something to do with all of the applications the Syrian girl has to fill out? Or something to do with the red cross that can be seen on some of the papers? And what does the boy in the photo have to do with it? And when someone is hot on Lina’s heels, Evi and Nils realize they must investigate!