A highly sensitive special investigation by Berlin-Neukölln’s narcotics squad awaits Fredo Schulz. He is a good cop with some rough edges; a widower and ex-alcoholic with extensive insider knowledge and excellent contacts. An undercover officer has been shot, and savvy and clever Fredo Schulz, virtually at the end of his career, is assigned the tricky case. Working with his partner Milan, he manages to recruit the young dealer Dakota as an informant. But the two investigators soon have the feeling there may be a leak within their own ranks.