Alex Prévost's cage, killings, and staged suicide
In Paris a young woman, Alex Prévost, is abducted by Jean-Pierre Trarieux and hung in a small wooden cage in a derelict warehouse while rats close in, and Commandant Camille Verhœven, whose own wife was abducted and murdered, hunts for her. Alex escapes, and the police learn she is a serial killer who pours concentrated sulphuric acid down her victims' throats, one of them Trarieux's son, which is why he took her. After Alex dies of an overdose in a hotel room, Verhœven discovers that her brother Thomas raped her as a child and prostituted her to the men she later killed, and that she staged her death so the evidence would convict Thomas of her murder.
