In a decaying town built around a massive underground structure sealed for centuries, rumors swirl about its purpose-treasure, ancient power, or even a doomsday device. When Tessa, a sharp-witted mechanic, discovers a pendant hidden in her late father's belongings, strange symbols begin appearing around her.
She soon learns she's the last living descendant of the town's enigmatic founder-the only person who can unlock the structure. But she's not alone in her quest. A secretive tech conglomerate seeks to weaponize the structure, a shadowy cult views it as the key to salvation, and a relentless assassin is hunting anyone tied to its secrets. Adding to the chaos, a crew of high-stakes thieves, led by Tessa's friend, arrives with plans for the ultimate score, believing the structure holds untold riches.
As Tessa delves into the founder's cryptic journal, she uncovers a devastating truth: the structure isn't a vault-it's a machine capable of erasing entire timelines. With the thieves triggering a countdown to the machine's activation, Tessa is torn between stopping her old friend and the heist, confronting her father's buried secrets, and preventing the factions from plunging reality into chaos.