Falling in love isn't the easiest thing in the world, especially when that world is coming apart at the seams. But that's exactly the situation that faces Ewan McGregor and Eva Green in director David Mackenzie's ("Spread") new romantic thriller "Perfect Sense," premiering at the Sundance Film Festival later this week. Check out the exclusive trailer premiere below.

Green plays Susan, an epidemiologist recently out of a relationship gone sour; McGregor is Michael, the charismatic chef who sweeps Susan off her feet and shows her that not all guys are a-holes. Sounds swell, right? And it would be... except for one tiny problem: At the same time Susan and Michael are falling for each other, a global pandemic is threatening to change the face of humanity forever.

And Susan, in her job as an epidemiologist, is right at the center of it all. When a truck driver in Glasgow experiences a sudden inexplicable crying fit and subsequently loses his sense of smell, Susan learns that more than 100 other people across Europe have been stricken in similar fashion. As more and more people around the globe begin to suffer these strange symptoms that first attack their emotions and then their symptoms, Susan and Michael are forced to try and weather the storm and find out how the human race might cope with such a pandemic.

Judging by the trailer, it doesn't look like Susan and Michael are going to remain symptom-free throughout the film, so it'll be interesting to see how or if they -- and humankind -- can survive the loss of emotional and sensory control.

What do you think of the "Perfect Sense" trailer? Tell us in the comments!