That's what is no longer breathable in Earth's atmosphere in this claustrophobic sci-fi thriller that finds engineers Bauer (Norman Reedus) and Cartwright (Djimon Hounsou) participating in a secret government operation to preserve society's "most valuable" citizens in hibernation underground. When their facility malfunctions, they face difficult moral choices in their struggle for survival. Sandrine Holt, Michael Hogan co-star. 94 min. Widescreen (Enhanced); Soundtracks: English Dolby Digital 5.1, French Dolby Digital 5.1, Portuguese Dolby Digital 5.1, Spanish Dolby Digital 5.1, Thai Dolby Digital 5.1; Subtitles: English, French, Portuguese, Spanish, Thai.