Penzkofer, caretaker of a residential complex in St. Pauli, loves Mettbrötchen, his round of skat and, above all, peace and order in his complex. However, this is over when he has to open an apartment due to water damage - and finds the obviously murdered tenant Schmadtke. Curious, Penzkofer begins to investigate himself and discovers that the bizarre neighbors in his building complex are keeping many secrets: Who murdered Schmadtke? Where is the stolen goods of Mrs. Schreier's husband, who is in prison, hidden? Where are beekeeper Schmadtke's bees? And how is it all connected? Penzkofer gets to the bottom of the mysterious events. In the process, he not only becomes a beekeeper himself, but also a cunning Sherlock Holmes in a janitor's coat ...