A film with more than the usual spoiler issues. Talking about it in any detail feels akin to handing you a gift-wrapped present and saying, "I hope you like it -- It's a thriller about a diabolical secret experiment."

While it doesn't offer any answers, it both thrills and makes you think.

It's a good bad... and worth a popcorn matinée. While it's easy to lament what could have been...

Strong acting helps the film overcome an uncertain premise and create characters that hold our attention absolutely.