In Vietnam, a mining operation turns the tides as an undiscovered tomb is disturbed, unleashing an evil spirit with the power to raise the dead.
In the wake of her grandmother's death, May discovers that she must shoulder the burden of shutting the gates of hell that Quang is trying to keep open.
With the threat from the ghosts rising, the humans struggle to deal with the situation as well as their own traumatic memories and past experiences.
Things come to a head as May makes the final move to banish the ghosts back to hell to protect her family and all of mankind.