Josh O’Connor portrays "Arthur," who has established a livelihood in the Italian countryside by utilizing his skill with a divining rod—essentially, a large twig—to locate ancient artifacts buried underground. He isn't opposed to some illicit grave digging, which recently led to imprisonment; now he and his associates sell their finds to "Spartaco" (Alba Rohrwacher) through an unusual method. It’s evident that “Arthur” is grappling with a significant past event, hinted at during a visit to the affectionate but oblivious elderly "Flora" (Isabella Rossellini) in her decaying mansion where the furnishings are headed for destruction and her family keeps a painful secret. He resides in a makeshift shed next to the old city wall, his once-respectable linen suit now soiled and worn, and he’s almost always smoking. As the story progresses—supported by a deliberately limited amount of conversation—it becomes apparent that "Arthur" is regaining clarity after suffering something like a head injury. Fragments of his life begin to coalesce as he and his companions unearth what appears to be an extraordinary discovery, only for... The film moves at a deliberate pace, which proves effective, as do the occasional moments of sharp humor. A parallel can be made between the slow uncovering of the lost relics and Arthur’s own gradual recovery, but this is presented in a way that prevents it from feeling gloomy or disheartening. Director Alice Rohrwacher presents us with a personal narrative interwoven with mythology and a measure of vague humanity that feels intriguingly unfinished. I suspect it would benefit from a second viewing; there's considerable subtle writing to appreciate.

Source on TMDB