The story begins when a scientist is working on an intelligent robot for humanitarian purposes, who discovers the company he works for is intends to use the robots for military purposes. The scientist steals one of the robots which ends up being lost and broken, then is fixed by a lonely 11-year-old boy. A robot boy and a human boy team up to save their respective parents, who are being held captive by the organization that funded the robot's creator. The two become friends and embark on adventures while being pursued by the authorities.

In Louisiana, the thirty-five year old single mother Lavina delivers a baby boy and a monster in the evil Whateley House. Ten years later, Dr. Henry Armitage and his assistant Professor Fay Morgan discover that the page 751 of every copy of the Necronomicon is missing and The Black Brotherhood has summoned the gate keeper Yog Sothoth to leave the portal opened to the demons and ancient gods. They invite the arrogant and skeptical Professor Walter Rice that can translate the Necronomicon to help them to seek the book. Meanwhile Lavina's son Wilbur Whateley ages very fast and seeks the missing page to open the portal.

When Abigail and Parker return from New York City to visit their home town, they discover that their best friend Rachel is a bridesmaid in the wedding of their childhood friend, Caitlyn, and Tony, who was Rachel's boyfriend until Caitlyn interfered. Abigail and Parker decide to run some interference of their own. They manipulate Caitlyn and become bridesmaids as well so that they and Rachel can sabotage the wedding from the inside. With help from a police detective who happens to be a groomsman, the girls strive to ruin Caitlyn's wedding while dodging her controlling mother and hopefully reuniting Tony and Rachel.

While driving at night on a lonely road, the car of estranged couple Don and Nancy is hit twice by another car in the middle of nowhere. Nancy asks for help and unpleasant sheriff Cleveland offers to take them to the nearby Motel Royal Vista and wait until the morning, when their car would be towed. When the couple arrives in the low-budget motel, they are attended by a weird receptionist. They are disturbed by noises and screams from inside the next room and Don asks them to keep quiet since his wife and he are tired and need to rest. But soon they realize that they are part of a sick and deadly game, and their lives are threatened.