After an autopsy confirms that a famous pop star overdosed on illicit diet pills containing a deadly toxin known as DNP - an explosive agent originally used in the trenches of WWI - the media gets hold of the story and runs wild with it. But who's behind the online marketing and distribution of DNP? The daunting challenge of putting the pieces together falls to Detectives Cari Garcia and Anson Chen. Can they solve these crimes before DNP becomes the next viral TikTok challenge?