History museum executive Peter Merser is skull-smashed with a Celtix ax. He was unpopular, allegedly outdated, had an affair with a colleague's wife and stood in the way of a promotion. With Korbinian Hofer visiting a friend in Vienna, Tobias Hartl must interim-assist Christian Lind, but still homeless Tobias's own suitcases worry the colleagues.—KGF Vissers