The astronauts Theo (Brandon Routh), Emily (Caity Lotz), Dvorak (Dane Cook) and Bug (Ben Feldman) are locked in an underground facility imitating a spaceship for 400 days simulating the travel to a distant planet. The intent is to study the psychological effect caused by the long isolation period without contact or communication with the outside world. They experience hallucinations and weird noises on the outside and close to the day 400, they see a stranger in their ship. When the man flees, Theo and Bug leave the facility and they find outside world dusty, dark and desolate. They decide to walk to seek somebody and while Dvorak believes it is part of the experiment, Theo, Emily and Bug believe that something bad may happen on Earth. "400 Days" is an intriguing thriller with an absolutely frustrating conclusion. There are flaws in the story (how a weak man like Bug is selected for such experience is probably the worst) but in general the film builds the mystery with an increasing tension. Unfortunately the lack of conclusion is a cold shower in the viewer. My vote is five.Title (Brazil): "Protegido: 400 Dias" ("Protected: 400 Days")

The ending was vague and disappointing. I loved the mystery of the story but the end did not justify the story line. A lot more could have been done with this plot.

This film intrigued me, then it frightened me. Then it confused me. Then it infuriated me. Then I made my peace and came here to share with others the joy of cinema. The wonder and suspense levels of this film are off the charts. What is happening? What will happen next? Is this a memory, a dream, a hallucination, a simulation??? From scene to trippy scene our poor brains are racked trying to figure it out. Maybe that bothers or annoys some viewers, but I live for stimulating films like this. The very ending is troublesome, but I guess that's the final kill shot in this mind destroying psychedelic head trip of a film.

I was willing to put up with 89 minutes of the low-budget quality of this 'film' just so I could see what apocalyptic calamity had befallen the earth during the crew's 400 days. In the last minute the director and the rest of the incompetents implicated in this pathetic attempt at storytelling just gave up and left the viewer with a whole lot of nothing when we would have taken almost anything. Nothing endings only work well if crafted by skilled storytellers. Inception had a great nothing ending. For his sake, I hope this director just ran out of money – at least that would be a reason which would compute. You're not being 'cool' 'edgy' or 'neat' by ending it this way. Netflix even got in on the scam by claiming in the description that the crew weren't sure if the 400 day test might actually be real. This was never the illusion they were dealing with. Anyway, I guess I'm the fool for not checking here for reviews first. Fooled me once...