Der Metzger muß nachsitzen(2015)

Overview:

For 25 years, restorer Willibald Adrian Metzger has heard nothing from his former schoolmates. Then he suddenly stumbles - quite literally - over the corpse of a former classmate who had bullied him in a cruel way in his school days. When Metzger arrives at the scene with the police, he can't believe his eyes: the body is gone. Against his nature and spurred on by Danjela's curiosity, the former eccentric organizes a class reunion to uncover the cover-up of the bloody deed. His former classmates are astounded by the eloquence of the actually shy outsider, who uses his sharp mind and great powers of deduction to twist their words around in their mouths...