The mark of death. Gruber A.

The Criminal Police Commissioner Sabina Nemes is extremely surprised to meet a woman in monastic clothing in the main BCA building in Wisbaden, which declares a desire to admit a crime. And not to anyone, but exclusively to a colleague of Sabina Marten S. Sneider. But after a stormy discussion with the new head of the BK, he quit, so Sabina has to replace it. From her hearing, she grabs her breath: a harmless woman, a woman states that in the next seven days she will commit seven murders - she stored silence about a motive and method. The elderly nun is detained, and the bustle begins in the BKA - especially after Sabina, despite all efforts, cannot be prevented by the first murder.

Very soon it becomes clear that all this is hiding an exceptionally sophisticated plan that intrigues Sneider. He returns to the BKA and, together with Sabina, gets involved in the game of the nun, not suspecting what dark abysses he will involve him this time an unpredictable rival.