The twelve-year old Todd Dougherty is an imaginative boy that loves comic books and hates to practice violin. When he travels on vacation with his father George Dougherty, who is an architect, and his mother Abby, they meet his client Denise Gore that is building a house in the woods with George. Todd finds the footprint of the monster "Topopkin" in the woods, but nobody believes him. Out of the blue, his mother vanishes in the woods. Six months later, George decides to get married with Denise, and Todd stays for a period with his beloved grandparents Shirley and Norman. When George discloses to Todd that he will marry Denise, Todd finds that she is a monster, but nobody believes him. His neighbor Wendy learns that Todd is telling the truth and together with her boyfriend Phlegm, they try to help him. Meanwhile, Denise eats a jogger and the paper boy in the neighborhood.
—Claudio Carvalho, Rio de Janeiro, Brazil