Porky is a police officer, who is in a police car that is named 6 7/8. He gets a call from his chief to go investigate goings-on at a haunted house. The house is haunted to the core, and the fun loving ghost plays a series of pranks on the unsuspecting pig. As Porky knocks on the door to enter the haunted house, the ghost does a lady voice "Come in." Porky enters, already frightened.
He enters again, the ghost places Frogs into a pair of shoes to look like a person walking, as Porky doesn't notice, the laces of the shoes get stuck to a coat hanger pole then rips off a curtain to make it look like a person with a cloak on. It immediately scares him and then the ghost scares him. Porky runs upstairs and lands in the ghost's arms with realizing, until that famous line comes as the ghost says it very goopy. "What the matter baby?".
Porky is finally scared out of the house, but he has the last laugh when his back-firing car leaves the ghost in blackface (and the ghost doing a Rochester imitation).