What is the main conflict in The Night the Ghost Got In by James Thurber?

The story centers on a common situation: the narrator (a first-person speaker, standing in for Thurber as a young man) hears a strange sound downstairs in the middle of the night. He assumes that it is a ghost, but his mother calls the police, who are thoroughly befuddled by the odd characters of the Thurber household and their way of life. By the time it is over, one of the policemen has been shot in the shoulder by the household's senile grandfather, and a local news reporter, told that a ghost is the cause of all the commotion, is left speechless. Since it is a light comedy, there are no serious repercussions in this story, and in the end life goes on in the household just as it had before.