The monstrance with the relic of St. Magnus, which Kluftinger was unable to prevent from being stolen as a young policeman, is finally returning home. Kluftinger was deeply affected by the fact that Lodenbacher hired Maier of all people to ensure the safety of the Allgäu patron saint at the opening of the exhibition. He would have liked to iron out the embarrassment from back then himself, but instead he has to solve the murder of an old woman. But Kluftinger wouldn't be Kluftinger if he didn't realize that the murder of old Frau Zahn was connected to the monstrance and its safety. Everything indicates that Frau Zahn had rented a shed from the old sawmill to the gang, of all people, who are planning to steal the monstrance again. In this situation, Kluftinger hopes to get help from Heinz Rösler, one of the art thieves of the time who is now in prison in Vienna. He flies to Vienna with Maier, not realizing that Sandy has put her up with Austrian police colleague Valentin Bydlinski overnight. Bydlinksi, who obviously has a full-blown messie problem, generously clears his bedroom for Kluftinger and Maier, but the two have to share a bed. During a private conversation, Rösler guides Kluftinger to the chapel in Roßhaupten, where a copy of the monstrance is kept. In a Bible there, Kluftinger finds a photo that reminds him of the second art thief from back then. Apparently, Rösler actually knows more about the planned renewed robbery of the monstrance, which is supposed to take place during the grand opening of the exhibition. But for supporting the local police, Rösler demands to be transferred to the Allgäu. It was only later that Kluftinger realized that Rösler wanted to place his very own cards in this game.