Dominoaffect Stories

A wise man once said that what we do affects others lives. He was right. Before I thought the saying was dumb until I seen all dominoes claps in front of me. Prehaps are better explain it better in better detail

A young girl who goes by the name of Cali has been hospitalized because of a rare disease. While fighting her battle, she meets someone who will change her life for the better. Who? Or what triggers this? And why does Cali suddenly forget who she used to be?