In the hills above Sherman Oaks, California, whistleblower Josh needs Cesar's help with his neighbors Lilly and Nadav, who have no control over their aggressive boxers Chip and Mocha, who terrorize their neighborhood and have attacked at least 15 other dogs. Lilly and Nadav quickly assert their fears about Mocha, who they consider to be a "silent killer" and the more dangerous of the pair. Cesar isn't sure about their assessment of which dog is more dangerous — and will he be able to rehabilitate Chip at all?Next, Cesar meets with whistleblower Lorraine, a dance instructor who is greatly concerned for her business partner Stefanie's fearful and aggressive Chihuahua, Nuts. Cesar observes Nuts in Stefanie's arms, trying to bite every student who signs in. He invites Stefanie and her husband to his home training annex where he teaches them how to create boundaries for Nuts. Will they learn the right moves so they can two-step away with a calmer, happier pet?