When victims are found dead from arsenic poisoning in Long Beach, Calif., handwritten death threats and other clues have the BAU looking for an UnSub fascinated with Greek mythology. Meanwhile, Hotch has concerns about participating in Jack's third grade career day.

The BAU continues its murder investigation in Texas, and clues uncover a deep web of corruption that could be the motive for the killings. Meanwhile, as one team member's life hangs in the balance, another concerned BAU member must face a sad secret from the past, and Garcia is thrust into action to save a colleague.