After a young pegasus saves her friend, a unicorn filly named Sweetpetal, she has to be taken to the hospital. There, she is diagnosed with a disease that the doctors can't seem to do anything about. Before she is admitted to the hospital, which becomes her home over the course of her life, she makes a promise that she'll be friends with Sweetpetal forever. But forever never lasts very long, as her illness makes her incapable of moving. Before she dies, she returns the one thing her friend lost.
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This is my first serious MLP fan fiction, and I'm still a bit of a novice writer. I hope you all enjoy the story anyways. It was kind of based on some things that happened in my life.

Whoops. I almost forgot to mention that there will be two different endings. You can choose which one you want to read depending on how you think the story should end.