RUSSELL MADNESS tells the story of Russell, an undersized but big-hearted terrier who dreams of having a family of his own. After running away from his pet store, Russell gets taken in by The Ferraros, a family desperate to revive their grandfather's pro wrestling arena. That's when they discover their new pet pooch has incredible wrestling skills. With help from his coach, Hunk, a savvy and hilarious monkey, Russell rockets to the top of the pro wrestling world and becomes a famous sports superstar. But when a dishonest promoter double-crosses the Ferraros, Russell will face his biggest challenge and discover that the strongest tag team is family.
八公（Forest 饰）是一条谜一样的犬，因为没有人知道它从哪里来。教授帕克（理查·基尔 Richard Gere 饰）在小镇的火车站拣到一只走失的小狗，冥冥中似乎注定小狗和帕克教授有着某种缘分，帕克一抱起这只小狗就再也放不下来，最终，帕克对小狗八公的疼爱感化了起初极力反对养狗的妻子卡特（琼·艾伦 Joan Allen 饰）。八公在帕克的呵护下慢慢长大，帕克上班时八公会一直把他送到车站，下班时八公也会早早便爬在车站等候，八公的忠诚让小镇的人家对它更加疼爱。有一天，八公在帕克要上班时表现异常，居然玩起了以往
