Lester falls asleep during church and dreams that he and Mary visit both Heaven and Hell. While in both places, they return to earth to see what has happened to their family and friends.
While in Heaven: Brenda inherits Lester's construction company and is a success when Calvin, her husband takes over. Pearl has moved in with them. Rose still hasn't come to terms with Mary's death.
While in hell: Calvin becomes a failure and sells the business to Julian for $500. Brenda is pregnant and the family is in poverty. Rose has married Julian and they have raised the rent of the building big time.