Tom falls in love with 'manic pixie dream girl' Summer, but she suddenly calls a halt to the affair and announces she just wants to be good friends. Tom is torn asunder by her decision, but as we wander back through their relationship it becomes clear Tom may have presumed more than Summer ever actually offered. '500 Days of Summer' is a clever, original, witty and perceptive indie flick about the painful vagaries of love and our eternal, most likely pointless, struggle to understand it.