This is an amazing and happy/very sad story.

One
family found out that their daughter had died in a van accident. 
Another family found out that their daughter, Laura, survived the
accident but was in a coma.  Laura’s family remained by her side
as she awoke from the coma and recovered.   Not everything though
was as it seemed.

Several weeks later, everything changed.  Laura was acting
strangely, not like herself.  There was a good reason.  She
wasn’t Laura but instead Whitney, who was Laura’s college
roommate.  She was the daughter of the family that thought their
daughter had died in the accident.

One family was elated, another family was crushed.