Whilst on holiday, Hoppy, California and Lucky encounter bank robbers who escape their pursuers in a newfangled horseless carriage, Hoppy will not let them escape again.
Professor Bruno Volpi spots some strange paintings on a cliff. He sends for Professor Zovek to help him discover its meaning. Zovek uses his powers to figure out the writings are a warning that a cosmic tragedy is going to happen. Their fears prove to be true when a fire ball falls from the skies causing the ressurrection of the dead as zombies, craving for human flesh.