Leo's cruel and greedy Uncle Crane is forcing him to use his ability to hear sounds from the past to steal the other half of the mysterious Siamese twin mask that was once owned by Leo's father--or be separated from his younger brother forever.

Monica Anderson thinks her biggest problem is taking her karate-chopping younger brother, Peter, trick-or-treating on Halloween. But she is wrong. After knocking on the door of an old, creepy house the kids are met by a strange woman pleading for their help. The evil Dr. Screem is after five horribly ugly ancient masks. These artifacts have the power to manipulate the world around them. Monica and Peter don't want to help, but they must retrieve the...