The Taylor's family dog, Max, is kidnapped by the evil Sirus Caldwell, (Zack Ward) CEO of mega corporation Envigormax, to be used as a test subject for a new super energy drink. When trials go terribly wrong, Max escapes only to be transformed from his lovable self into... ''Monster Mutt''! The Taylor kids, Ashley (Rhiannon Leigh Wryn) & Zach (Billy Unger) try to save their loyal friend with the help of the scientist, Dr. Victor Lloyd (Brian Stepanek), who regretfully helped transform Max. The children must elude the evil Sirus and his henchwoman Natalya (Juliet Landau), who are determined to capture Monster Mutt to complete their experiment! Monster Mutt, is an adventure in both comedy & chaos as the Taylor kids race to find a cure for their furry loved one before it's too late!