Entanglement

Ben Layten, a recent divorcee, leads a miserable, jobless life. After several unsuccessful suicide attempts, he ends up befriending his sarcastic, yet helpful neighbor Tabby Song. While constructing how his life fell apart through quantum entanglement, Ben learns that he almost had an adoptive sister. Feeling that this is the key to his happiness he sets out to find her only to learn that it is a woman he met earlier named Hanna Weathers. Through constant visitations with her, Ben falls in love with her and learns that life and love is far more complicated than he thought. Read more on Wikipedia.