Tom, greeting-card writer and hopeless romantic, is caught completely off-guard when his girlfriend, Summer, suddenly dumps him. He reflects on their 500 days together to try to figure out where their love affair went sour, and in doing so, Tom rediscovers his true passions in life.
Emma is a busy doctor who sets up a seemingly perfect arrangement when she offers her best friend Adam a relationship with one rule: No strings attached. But when a fling becomes a thing, can sex friends stay best friends?