remember when...?

just as a young couple really start to fall for each other, a tragic accident puts one of them into a coma.
aleah's first instinct is to hide away, embrace the sadness and wait for the news of katie's death. but when it doesn't come, and she stays asleep for weeks, then months, and even a year, aleah has no choice but to move on with her life. but moving on doesn't usually mean becoming the big sister that was lost, or the daughter, but that seems to be exactly what happens over the seven years without kate. but when kate finally wakes up, how do they both fit into each others' lives? and more so, will katie wake up to find the love of her life waiting for her, or a replacement?