Barbara Aubert actually wants to lead a quiet life in the small town of Tulln after selling her company in Vienna. However, the provincial idyll is disrupted by a brutal robbery-murder. An important art collector is killed, and a painting by Egon Schiele is stolen. The city's prominent figures come under suspicion. The eccentric professor, the head of the tax office, and the police commander – soon everyone is a suspect. Barbara believes she is safe until she comes across a clue that makes her think of betrayal.