Hallgrim moves into the Opera Hotel to recuperate and, like the hero in the Hitchcock film Rear Window, becomes fascinated by a beautiful young woman in a flat opposite. When he sees a man enter and start beating her, he films the attack and he recognises the man as Benjamin Stern, an unscrupulous member of the Israeli mafia. He later discovers a disturbing connection with a child pornography ring. (thetvdb.com)