Leading Dirndl shop-owner and tailor Babette Feichtner was murdered in the third generation firm. Sven Hansen and Anton Stadler first suspect Babette's younger sister Evi Feichtner, who still feels cheated when bought out and recently denied a loan for her ailing rival shop. Husband Roland Feichtner, who adopted her name for commercial continuity but inherits nothing, fails to hide he was found out having an affair with regular model Nina Kerschbaumer, whom Babette furiously fired, and his secret account was accidentally discovered. A security video disproves a crucial alibi.