In the detective agency of Kalle Bohne and Gitta Gurke, the phones are ringing off the hook. 80 tricky cases are waiting to be solved. But beware: the crooks use all kinds of tricks and vanish without a trace after the crime. Really without a trace? No! Because those who look closely and don't let themselves be misled by false leads will find the answers. All clear? Then let's go! Gitta and Kalle are already on their way.