A 21-year-old woman, Eliza, disappears. Seven years later a man dies by the Egyptian obelisk in New York City's Central Park. He wears clothing from the late 19th century, has French francs and coins from the year 1887 in his pocket plus receipts from The Louvre and a French restaurant dated 1889. And next to his body is an ornate piece of jewelry: The Brimstone. But the events are linked. The woman's sister, Juliet, approaches the man's son, Dalton, with a theory: his father found a way to transport her sister to Paris in 1889.

Dalton contacts an expert, Proctor, and realizes Juliet's theory is real. Also in pursuit of The Brimstone is a grisly mercenary with orders to find it at any cost. Dalton, Juliet and Proctor gather at midnight by the obelisk in Central Park, the portal. They're about to leave when the mercenary appears and grabs the Brimstone. All four are transported back to Paris, 1889 with no way to get back.