Darkness

NFHS 4-2:

ART. 3 . If weather or darkness interferes with play so that the game is called (ended) by the umpire, it is a regulation game:
a. if five full innings have been played, or if the home team has scored an equal or greater number of runs in four or four and a fraction turns at bat than the visiting team has scored in five turns at bat; or
b. if play has gone beyond five full innings.
If the game is called when the teams have not had an equal number of completed turns at bat, the score shall be the same as it was at the end of the last completed inning; except that if the home team in its half of the incomplete inning, scores a run (or runs) which equals or exceeds the opponent’s score, the final score shall be as recorded when the game is called.

ART. 4 . A state association may adopt game-ending procedures that determine how games are ended, including suspended games......

So if the game hasn't gone at least to the top of the fifth, the game is "no contest", unless the state has decided otherwise.
In a called game, if both teams have had an equal opportunity in batting, or the home team is ahead or tied while they are batting, the score stands (including a tie). If the visitors are ahead, the score reverts to the last inning.

I haven't quoted all the relevant rules here. But since you'll be buying a rule book......

I'm assuming since you are in the ninth the previous inning was tied and the home team is trying to kill the game thinking it goes back to the tie.
What happens is it would just be a suspended game to be picked up at a later time.