Marshall is a pre-teen who loves horror films, and lives with his single mother. He struggles with the absence of his father and his mother's boyfriend, Ted. Despite not sharing his interest in horror, his best friends are Amy and Gilbert. Hearing rumors of a body kept in the basement of recently deceased Mr. Kubat's house, the trio sneak into the house to investigate the rumor. They discover that Kubat was storing an
Egyptian mummy, seemingly illegally. When moonlight strikes an ancient amulet, the mummy is resurrected. He scares the kids, but they soon discover he's harmless, albeit clumsy. They decide to name the mummy Harold and realize they need to hide him for his own safety. They visit their adult friend, Bruce, who owns a horror shop and has an encyclopedic knowledge of the occult, mythology and the supernatural. He tells them that if the mummy isn't returned to his
sarcophagus before midnight on
Halloween, he'll perish. Unfortunately, Harold's sarcophagus remains in Mr. Kubat's house, who himself turns out to have faked his own death as a method of
tax evasion. Additionally Kubat is involved in various schemes including trafficking
black market artifacts, like Harold and his sarcophagus. Discovering that the sarcophagus is empty, Kubat dispatches his men to hunt the mummy down quickly due to having a buyer interested in the artifacts. Despite having an easier time blending in at a Halloween party, Harold is discovered and apprehended by Kubat's men. The kids enlist Bruce's help to rescue Harold. The group defeats Kubat and his men, and reunites Harold with the female mummy with whom he is in love. The two mummies return to their sarcophagi and re-enter their eternal rest. After the adventure with his friends, Marshall decides the mature thing to do would be to accept his mom's boyfriend and scales back his horror fandom. He then goes to the movies with Gilbert and Amy, signaling that he has feelings for Amy. ==Cast==