Bella's youth consisted of two things: Lucas and an old tree house that is perched up on an abnormally large maple tree. Bella and Lucas spent most of their time in this tree house, but when his family moved across the country, Bella felt as if her world caved in on her. When years pass, and they run into each other in none other then, New York, the duo reconnect and feel once again that their world is together again. When another tragedy strikes once again and Lucas is a victim to memory loss, Bella does anything she can to help him remember his life. Will the moments return or will their memories remain trapped in their maple tree?

Lilly and her brother Luke are very close siblings. When Luke is given two years to live, Lilly must make the last of their time together the best times of their lives. Together, they show the lengths true siblings will go to, in order to make dreams come true. Will they achieve everything they set their minds too, or will they run out of time? Because in reality, everybody knows, nothing lasts forever.