An alien is left behind on Earth and saved by the 10-year-old Elliot who decides to keep him hidden in his home. While a task force hunts for the extra-terrestrial, Elliot, his brother, and his little sister Gertie form an emotional bond with their new friend, and try to help him find his way home.
Hubie Dubois, despite his devotion to his hometown of Salem, Massachusetts (and its legendary Halloween celebration), is a figure of mockery for kids and adults alike. But this year, something really is going bump in the night, and it’s up to Hubie to save Halloween.