Thirteen-year-old Will Donovan wishes he could enjoy his friends and trick-or-treating without the nuisance and responsibility of his talkative younger brother, Sam, tagging along. When Will's wish comes true after finding a strange goblet in the attic, Sam suddenly vanishes into thin air through the attic wall, and Will is challenged to muster up the courage to travel to a strange world to save him. Fortunately, Will's friends and characters they meet along the way won't let him face this dangerous journey alone, as they end up confronting their greatest fears, deadly creatures, and an epoch battle between good and evil.