After the signal tower battle in the previous season, Te Kaopu was severely injured. His distant cousin, Bye-Bye Joe, made his entrance, inheriting all of Te Kaopu's assets and vowing to become even more powerful. Bye-Bye Joe had his underlings spread terrifying rumors about him throughout the Sleepless City: with a mere lift of his finger, he could instantly knock out other insects; with a wave of his hand, he could control objects from a distance to attack... The Sleepless City once again fell into chaos. Briar Bear alone was no match for them, so he had to leave the city to find Bramble Bear and Bald Qiang. At that time, Bramble Bear and Bald Qiang were still searching around the signal tower for traces of the shrink device, but after a long and fruitless search, Bald Qiang and the two bears got into an argument over differing opinions and parted on bad terms. After calming down, Bramble Bear and Briar Bear went back to look for Bald Qiang, only to be intercepted by Bye-Bye Joe's henchmen. With the odds stacked against them, danger loomed everywhere... Meanwhile, Bald Qiang, feeling hopeless, thought of his elderly parents and decided to let go of everything and return home. He headed to the Bear Ridge High-Speed Rail Station, where, by sheer coincidence, he spotted the shrink device hidden among a pile of parts. Just as Bald Qiang was filled with joy, he ran straight into Big Monkey and Two Dogs, who seemed to see another chance to strike it rich overnight. While Bald Qiang was being pursued by Big Monkey and Two Dogs, and the two bears were being chased by Bye-Bye Joe's henchmen, both sides ended up in the high-speed rail station waiting room. A major battle was about to erupt! The bear trio cleverly used the terrain and the crowd to their advantage, successfully shifting the conflict and causing Big Monkey and Two Dogs to tangle with Bye-Bye Joe's henchmen, allowing themselves to slip away unnoticed. Unfortunately, the shrink device was lost once again in the chaos... Facing the new adversary Bye-Bye Joe and his wicked henchmen, can the bear trio outsmart them and protect the insects? Will they be able to retrieve the shrink device and return safely to Bear Ridge?