The Unholy Garden (1931)

At a hotel in the middle of the Sahara, an old man and his daughter try to keep the location of a hidden treasure from a collection of thieves and criminals staying at the hotel who are determined to get it. A suave gentleman thief arrives at the hotel one day with his own plan to get the loot, but complications ensue when he begins to fall for the daughter.

Unfortunately the movie The Unholy Garden is not yet available on HBO Max.