In One Breath - DVD

Without warning, an earthquake strikes Paris, releasing a deadly poisonous gas from cracks in the ground. Panic grips the city.
Mathieu and Anna are among the few who manage to escape to the top floors of a local skyscraper. However, their daughter, Sarah, who suffers from a weakened immune system, is left far below them in a hermetically sealed chamber she cannot survive without. Hours pass and no help arrives, and they both know that the battery powering the air chamber won't last much longer.
How can they replace it before it runs out completely and turns their daughter's refuge into a deadly trap? With time running out and knowing they can only rely on themselves, Mathieu and Anna venture out into the deadly mist to save her.