This is a fairly standard quest story with some romantic fantasy thrown in. The quest is for the source and history of the painting. Lily and William spend much of the movie on a leisurely paced quest. I found it a little too leisurely.
There is a bit of obsession with a cross between finding/having a soulmate and destiny. That's the romantic fantasy part because the story seems to prove one or the other or both.
I had trouble finding much chemistry between Aubrey Reynolds and Richard McWilliams. McWilliams was restrained and William's secret (which we learn very early) keeps an invisible barrier between them.
The boss, Michelle, was over the top annoying in the beginning but quieted down at least a little after that.
This movie was mostly a miss for me. It wasn't because of Aubrey Reynolds who held her own and her looks are attractive and mysterious at the same time. My main impression of the movie is a slow shallow story which wasn't helped by the obsession with the idea of a soulmate.
But I think many, especially less right brained people than me, will love this.