I managed to see this on Amazon streaming. As it began I wasn't sure if I actually wanted to finish it, and at the 7 minute mark both characters seemed so dysfunctional that I considered abandoning it, but I didn't.
While there are several characters listed, only two of them speak, all the others might as well be background extras. It is a unique approach but it works pretty well.
Keanu Reeves is Frank and Winona Ryder is Lindsay. They meet, sort of, while waiting to board a plane, but it is all friction. Then they end up on an 8-passenger plane to San Luis Obispo, and they are seated next to each other. As they compare notes it turns out they are both headed to the same destination wedding in a Paso Robles vineyard. In fact she is the groom's old girlfriend and he is the groom's brother.
All this makes for a number of funny situations, the enjoyment of the viewing depends on how well one likes the two actors. He is jaded, doesn't believe relationships can ever work out beyond quick encounters. She is the romantic, she believes everyone has a special person somewhere in the world.
The funniest scene is when they encounter a mountain lion as they take a walk after the wedding. Then out of character get amourous with each other.
I suspect many viewers will really hate this experimental movie but I enjoyed it as something quite different.
