Peter Egermann visits and murders a prostitute named Ka, committing an act of necrophilia. The coroner interrogates Peter's friends for an explanation. Mogens Jensen tells the coroner he is shocked by the murder, claiming there were no signs this could happen. Peter is married to career woman Katarina; they have no children. In fact, Peter had confided in Jensen that he was plagued with homicidal thoughts, primarily aimed against Katarina. Jensen considered the thoughts likely not serious, but advised Katarina to leave town. Katarina dismissed the warning as preposterous, and given it was a busy season for work, she decided it was impossible for her to leave.