A shocking news shakes the idyllic, summery Vienna: An unknown assailant has taken several hostages in the world-famous Imperial Crypt. Sarah Pauli, a journalist for the Wiener Bote, fears the worst as she reports on the scene. And her instincts prove correct. The perpetrator shoots two people without apparent reason, then turns the gun on himself. Sarah discovers that one of the deceased was a prominent Viennese fashion designer. Was the act a targeted assassination of the woman? And what is the mysterious skull found on one of the coffins in the crypt all about?.