Amsterdam Zoo Artis animal handlers supervisor Willem Kraan is found locked in the lion cage and practically devoured. His wife Marjan accuses his ex and alleged lover Ina de Vrede, with whom she had a crazy feud. Frank de Moor, whom Willem fired recently, was seen around. An animal smuggling opponent thinks the illegal trade gang they were after ordered him murdered, so De Cock searches for a possible inside accomplice.
—KGF Vissers