On a day of thunder and lightning, the imprisoned One-ear successfully escaped from prison, which attracted the attention of Black Cat Sheriff. The next morning, the piglet Sandu, who admired Black Cat Sheriff, was pulled away by his partner Dazhuang and sneaked into the Emerald Star Museum which was about to open. The museum was formerly a spaceship, which was developed by Dr. Yangshan himself sixty years ago. Just when they were having a great time, the two little guys suddenly saw the sneaky One-ear and a burly and vicious evil man. This guy claimed that he had been betrayed by Dr. Yangshan. When he learned that Dr. Yangshan had passed away, he had nowhere to vent his anger. The cunning One-ear instigated the other party to transfer the object of revenge to the people of the whole city, and kidnap all the citizens when the museum opened the day after tomorrow. Sandu took advantage of the chaos to snatch the energy block from One-ear's hand, and Black Cat Sheriff is about to face an unprecedented challenge...