In 1954, Anna Matheson boards a luxury overnight train bound for Chicago that she’s commissioned, along with a list of names and a heart hardened by loss. Twelve years earlier, during the height of World War II, six people shattered her family’s life. Now, under a false guise, Anna has orchestrated a chilling reunion—trapping each of them aboard.

Her plan is precise: confront the ghosts of her past, unearth long-buried truths, and ensure justice is waiting at journey’s end. But when one of the passengers is found murdered before dawn, it becomes clear that Anna isn't the only one harboring secrets—or seeking revenge.

As the train hurtles into the icy night, Anna must navigate layers of deception, reckon with the cost of vengeance, and come to protect the very people she came to condemn. Because someone on board is determined that none of them—Anna included—reach the final stop alive.