The tone of the film veers wildly from paranoia to predestination, making it an unsuccessful marriage of The Manchurian Candidate with It's a Wonderful Life.
Anyway, the point is that you've seen this sort of thing before, all the way back to It's A Wonderful Life, even if its fake-serious energy and matte finish will temporarily and entertainingly trick you into thinking otherwise.
They get assigned odd menial tasks on Earth, like wandering around listening to the thoughts of people with whom they can never interact (Wings of Desire), keeping suicidal drunks from offing themselves (It's a Wonderful Life), and trying to get notoriously fickle humans to fall (and stay) in love (A Life Less Ordinary).
Based on a Philip K. Dick story, this metaphysical fable takes place in a world somewhere between The Matrix and It's a Wonderful Life, where David (Damon), an up-and-coming politician, bumps into Elise (Emily Blunt) as he rehearses a concession speech in a men's room.
In It’s a Wonderful Life , George Bailey discovers, with a little supernatural assistance, that he has a very precise destiny and that one misstep could generate a radically different future.
Think Mr. Smith Goes to Washington meets Inception, with a love story thrown in: Matt Damon and Emily Blunt in The Adjustment Bureau.