Willow Monroe and Kennedy Danes have been best friends since first grade. They are inseparable, love to ride bikes together, smile at life and laugh. At the end of his senior year at school, Kennedy learns that he is terminally ill. However, he does not despair, but tries to find a way to tell Willow that he has six months to live. Willow and Kennedy can't say goodbye to each other. They agree that they will always say “hello” until the very end. August 16, 1997 Willow and Kennedy say "Hello" to each other for the last time. Nine years have passed. Willow works as a nurse at a small hospital in Chicago. There she meets Wyatt, a grumpy patient whose appearance hides a pure heart and deep wisdom. When they finally call a truce and agree to be polite and not be rude to each other anymore, Wyatt admits that he sees a light in Willow that will never go out. Everything changes when Wyatt decides to tell Willow his dark secret. Willow is torn, she must decide whether to suppress the feelings she is so afraid of, or maybe open her heart...