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Its proprietor has written for a popular Substack newsletter, Aporia, which covers subjects like “white identity” and is reportedly published by a group called the Human Diversity Foundation, whose leaders have advocated for the deportation of nonwhite Europeans and the establishment of a whites-only ethnostate.

Well, it’s more serious than manufacturing the perfect date because “Aporia” deals with loss and grief.

With its simplified quantum mechanics, abiding sensitivity and the sleepy neighborhood richness of Nicholas Bupp’s Los Angeles cinematography, “Aporia” needn’t stay one step ahead of smart viewers to keep us intrigued and off-balance, glued to how these flawed, well-intentioned characters use their irrevocable power and face the consequences.

Conquering time travel may be a big deal, but Greer’s affecting portrait of a woman processing a second chance keeps the miracles of “Aporia” grounded and not flashy — a portal to human epiphanies, not digitally rendered spectacle.

It’s that opportunity that provides the tightly wound cause-and-effect power to writer-director Jared Moshé’s small-scale fantasy “Aporia.”