In 1984, Diana Prince lives a quiet life, curating ancient artifacts and performing heroic deeds as Wonder Woman in secret. However, her solitude is disrupted when an enigmatic stone that grants wishes lands in her possession courtesy of a jewelry store heist. Diana, unknowingly using the stone's power, yearns for her lost love, Steve Trevor. Meanwhile, mousy geologist Barbara Minerva, Diana's new colleague, wishes to be strong, confident, and like Diana, but her transformation has unforeseen consequences. As Diana enjoys a reunion with Steve, she remains oblivious to the unfolding dangers of the stone's ultimate price.

Businessman Maxwell Lord, obsessed with success and power, covets the stone's ability to grant desires, and he manipulates his way into acquiring it. His machinations bring global chaos and threaten the fabric of reality, exploiting human greed and weakness. With the world in peril, Diana must contend with the unraveling consequences of granted wishes, face the repercussions of her own desires, and confront the threat posed by an empowered and increasingly dangerous Barbara. Diana's journey challenges her beliefs about justice, friendship, and sacrifice, as she strives to save humanity from its own wishes run amok, grappling with the profound cost her own wish has extracted from her.