John instructs Sam to wait in the house until the police get there. Then he goes searching for Louisa after grabbing some flares, a flashlight, and a high-powered rifle from Officer Lowry's trunk and emptying a can of gasoline around the mound. He crawls into one of the openings in the mound and finds himself in a labyrinth of tunnels. Using the flashlight to light his way, he locates Louisa lying in the dirt. He revives her and carries her through the tunnels looking for the way out, but they are pursued by the mound walkers. They make it outside of the tunnel, blowing up a few mound walkers on the way, and John blocks the tunnel with a gasoline barrel and lights a flare. Another mound walker appears to protect his queen. Covered with mud, Louisa begs John not to leave her, but she has begun to transform into one of the creatures. John drops the flare into the gasoline, and the mound explodes into flames. Meanwhile, Sam has come outside carrying a photo of himself, his sister, and his dad. In the glass's reflection, a unidentified figure can be seen walking toward him from out of the fire. Behind Sam can be seen three mound walkers, one climbing down a tree on the left of the screen, another climbing down the side of the house, and the third approaching on foot from the right side of the screen. Sam hears the crunching of leaves. In the final scene, Sam asks, 'Daddy?', but a screech is the only reply.