After numerous failed attempts to commit suicide, our hero Harold Lloyd runs into a lawyer who is looking for a stooge to stand in as a groom in order to secure an inheritance for his client (Davis). The inheritance is a house, which her scheming uncle "haunts" so that he can scare them off and claim the property.
In this movie a series of people appear in white sheets and covered in flour until the prank is uncovered. In a more unusual prank a pair of trousers walk on their own, having a little black boy inside.
Crooked Uncle tries to make Harold Lloyd believe that the house is haunted and frighten them out. And then the estate will be his.
In the movie Haunted Spooks when Harold and his wife reach the mansion, the uncle plays a series of tricks to make the house appear haunted.