The Underdog Bites Back - Munch's adoptive son Joseph is arrested and put in a holding cell. He is suspected of murdering Arnaud Carlier, lawyer of the pharmaceutical lab that he and Bellanger have been fighting. Overwhelmed by the sudden, tragic death of his girlfriend from a pulmonary embolism, Joseph had threatened the lawyer. Convinced that he is innocent, Munch will have to use the most twisted techniques she can come up with in order to get him released. But as they dig into the case, Munch and Bellanger butt heads with the all-powerful American laboratory, fully committed to defending its interests.