Karen, a young psychiatric nurse, boards the last subway train headed toward the end of the line. Suddenly it stops in the middle of the tunnel, and the nightmare begins... A group of religious cult members have finally gotten their long-awaited signal that the armageddon has started and it is now their sacred duty to save the souls of as many people as possible. Caught in a whirlwind of murder and madness, karen and a few survivors band together to fight the cult members in the dark underground tunnels of the subway. But can they even trust each other? and why are they seeing terrifying supernatural occurrences? could the cult be right?