 While jogging, De Gier falls into a mysterious grave-shaped hole. The next day, it is closed, and when a curious De Gier starts digging he finds the body of a known animal liberation activist. He appears to have died of infection after being shot with police ammunition. Possible suspects include his family, a police officer and the ruthless Animal Liberation Front leader. Hetty is having mysterious phone conversations, and Cardozo thinks someone is blackmailing her. De Gier shadows her and discovers that she is secretly working as a call-girl.