In a gripping opening scene, a bus crosses the Iranian border as Scarlet Marlowe (Perdita Weeks), recording into her camera, shares her daring mission to unearth a historical artifact hidden in an impending demolition site. Aware of the dangers posed by Iranian authorities, she confidently quips, "They'll have to catch me first." Seeking access to the catacomb, she visits Reza ([Hamid Djavadan]), who cautions her about the urgency of their task. Despite her reassurances, they find themselves hiding from soldiers as they navigate the perilous site. Fueled by her determination to honor her late father's legacy, Scarlet uncovers an intricately marked bull statue known as The Rose Key. However, their excitement is short-lived as the noise of an impending blast grows louder, prompting a frantic escape that Reza ultimately leads.
Later, during a filmed interview with her cameraman, Benjy (Edwin Hodge), Scarlet reveals her quest for the legendary Philosopher's Stone, a mythic object believed to grant eternal life and the power to transmute metals into gold. As they delve into her father’s tragic history, a painful silence envelops the discussion of his past endeavors that culminated in his death.
The scene shifts to Paris, where they investigate the crypt of Nicolas Flamel, reputed for his supposed possession of the stone. Discovering that the graves of Flamel and his wife had been raided, Scarlet theorizes that a code marking could reveal the stone's whereabouts. This leads them to George (Ben Feldman), who reluctantly agrees to assist in translating the cryptic clues, despite their complicated past. The stakes rise as they realize they need to explore under Flamel's tomb, leading them to the catacombs, guided by a local named Papillion (François Civil).
As the group embarks on their clandestine journey through the catacombs, tension mounts with the sensation of unseen dangers lurking. They encounter chilling rituals, claustrophobic tunnels, and an ancient ritualistic piano that evokes George's tragic memories. Soon, palpable fear manifests when they confront apparitions from their pasts, echoing haunting regrets—such as Benjy’s fatal fall or Papillion’s guilt over a lost friend.
Scarlet discovers the truth about her quest and her father's legacy amid perilous challenges. Navigating through supernatural forces and twisted realities, she faces a choice that could save or doom them all. Alone, she ultimately locates a way to harness the power of the Philosopher’s Stone, understanding that acceptance of their burdens might offer salvation.
In a moving conclusion, the remaining trio takes a leap of faith—both literally and metaphorically—connecting their experiences to the core phrase, "As Above, So Below." They emerge back onto the streets of Paris, forever changed. In a reflective interview, Scarlet reveals her true intention: to seek the wisdom and essence behind the legend, declaring, "I want the truth." Thus, her journey becomes not just about golden myths, but the deeper truths we all combat.
