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Naomi Watts and Ewan McGregor face the unthinkable in their new drama based on a true story of one family's survival of the 2004 tsunami in Thailand. Watch the intense trailer for The Impossible…

Video: Tsunami Survivor Petra Nemcova Reacts to Latest Disaster in Japan 

In theaters December 21, The Impossible finds Naomi and Ewan as Maria and Henry, a young couple enjoying their winter vacation in tropical paradise with their three sons. But on the day after Christmas, their relaxing holiday becomes an exercise in terror and survival when their beachside hotel is pummeled by an extraordinary, unexpected tsunami.

Video: Josh Duhamel & Fergie Bring Wave of Support to Japan Tsunami Victims

The Impossible tracks just what happens when this close family and tens of thousands of strangers must come together to grapple with the mayhem and aftermath of one of the worst natural catastrophes of our time.