The original English name of the film, Ben, is the leader of this group of smart mice, who nearly died because they no longer followed the command of the young Willard, who trained their wisdom. Bain made a pre-emptive strike and led a group of rats to kill him. With spirituality, Bain can direct rats to ravage supermarkets and candy stores, kill humans who want to destroy them, even understand human language and get along well with friendly people. He became friends with Danny, a teenager with a heart attack, and they often played together in the game room and hugged each other and slept together. However, human beings could not tolerate their existence, and the detective responsible for destroying them finally found their hideout, so they launched a human-mouse war.