Johnny and Dukey are walking along his street, looking at the Halloween decorations. As the pair pass each one, Johnny points out that they aren't scary. Once they reach his house, however, they come upon a letter, nailed to the door with a bloody knife. Johnny reads the letter, which says that if they spend a night in a haunted house by the graveyard, they'll win a ton of candy. All that Johnny has to do is spend the night there in the provided costume.
Johnny agrees, and is then seen is his room in the costume–a tutu. Right after he expresses astonishment at the costume, his sisters walk in and make fun of him. They then tell him they're going to the Institute costume party as Mr. Black and Mr. White, and that they're going to win first prize.
Later, the scene changes to outside Johnny's house with Dukey wearing his Super Pooch costume. While Johnny and Dukey are walking to the haunted house, they see a person in a lame ghost costume. The person reveals herself as Jillian who has a cold, and she offers to come along with Johnny. He agrees, and the troupe of three move on to the haunted house.
Johnny rings the doorbell and enters the house. The camera then shifts to a control room occupied by Dark Vegan. He tells that they have to survive a night in the house in order to win the ton of candy. When Johnny points out that what the invitation said was spend a night, Dark says it was a "typo", and pushes a button, sending them into a pit inhabited by spiders.
Johnny initially thinks the spiders are animatronic, but changes his mind when they spray him and his friends with silk. He then helps his friends out by defeating the spiders, capturing them in their own silk. Dark is enraged by this, however, and he then pushes a button, opening a trapdoor in the floor. This trapdoor is not under the trio, however–instead, it reveals a number of alligators, waiting to devour them.