'Coastlines' is a film that draws you in with superb character development. It takes a methodical approach allowing the players on screen plenty of space to grow their characters. Through the first parts of the film I was riveted; not by flashy Hollywood gimmicks, but through the purity of each actor's performance and their course through the story.
The progression through the middle of the film maintains this steady hand, and we are introduced to branching story lines which keeps the viewer guessing at what's coming next. Is this a revenge film? Is it a story about friendship, or perhaps a story of betrayal? It never becomes clear as to what 'type' of movie you're watching, and this leads to a sense of anticipation as the film is rarely predictable.
I was waiting for some kind of dramatic conclusion near the end, or more appropriately, I was pondering what judgments the film would make on the morality of its characters. 'Coastlines' never makes any bold statements to this effect, however, besides perhaps the thematic allusions to unconditional love. The story takes a foray into complex adult themes without finding a coherent resolution, and I feel this was the bridge too far for 'Coastlines'.
If you are a patient viewer who appreciates the nuances of finely wrought character development then I encourage you to see this film... and draw your own conclusions.