On a quest for traces at Kilimanjaro. Who is this stern-looking man whose photo hangs above the dining table? Tillmann Prüfer knows little about his great-grandfather - only that he lived as a missionary in Tanzania in the early 20th century and had little sense for worldly distractions. It is only when his mother wants to embark on a search for traces in Africa that Prüfer begins to investigate. He learns not only that his great-grandfather once found happiness in the distance, but also that he is still revered there almost like a saint. Thus, a family vacation suddenly turns into a highly official affair, during which Tillmann Prüfer finds himself at the foot of Kilimanjaro before thousands of believers waiting for wise words from his decidedly unholy mouth. A family searches for its history - very entertaining and highly exciting!.