Too Hurt to Forgive: Who can mend a broken heart?

After experiencing heart break and loss, Robin, a good looking computer scientist turned to drugs for solace, and opted for the street life, where he met Monica, a committed Christian doctor, who challenged him to quit the street life. Now reformed, and happy to start a new life with Sharon a charming health practitioner, whom he thought had covered up for his past hurts. What happened on the day Robin planned to engage Sharon? and why the search to see Monica again at all cost?