Crimson blooding in the early morning Berlin Cathedral. A female priest hanged under a round ceiling. Detective Tom Babillon rushed to the murder site witness more unbelievable things. The victim's neck has a key engraved "17" on the cover. It is the same key that Tom was found near the dead body in the river as a young child, and the sister was still holding at the age of 10. Why is it here? Tom begins investigating with Geta of a clinical psychologist... With a total of 430,000 copies in the country, the first release of the German mystery that sends at overwhelming speed.