Guilty love?

Rachel has it all: friends, a lovely fiance and a place in one of the best colleges in the country. But one night changes her whole life... And now Rachel lives alone in a small apartment, it's a boring job, no privacy and, in General, there is nothing but memories and guilt over the death of his best friend.
Five years later, Rachel decides to return to his native town and, after waking up, realizes that her life is perfect. She has everything she could only dream of, and her friend is alive and seems quite happy.
But how is this possible? Is life gave her a second chance? Rachel refuses to believe it and as the puzzle collects together the events of the past and present to understand what happened to her really...