Elevation

When powerful creatures arrive from the underground of Earth everywhere in the planet, 95% of mankind is wiped out since the creatures are indestructible. The survivors find that the creatures are unable to transpose 2.400 m height and live in communities at this elevation. Will lives alone with his son Hunter since his wife Tara went in an expedition when only the scientist Nina survived. Hunter is a sick boy with respiratory problems and when his filters finish, Will intends to go to the hospital at Boulder City to bring medical supplies for Hunter. He goes with his best friend Katie and Nina to the city in a dangerous journey since the city is below 2.400 m height.