Adam, Austin and Nessa have been neighbors and best friends since Kindergarten when Nessa declared herself Princess of the boy's tree house she dubbed The Castle. Now starting their senior year of high school, each member of the trio is forced on a journey to learn the true meaning of love, friendship and how every decision has consequences. Diagnosed with brain cancer, Adam has a 15% survival rate and is leaving the neighborhood where he grew up with Austin and Nessa to seek experimental treatment in a town 8 hours away. Learning from Adam just how precious time is, self-professed player Austin is trying to get over his fears and commit to the one girl he truly cares for when she needs him most, Nessa. Fearing Adam's prognosis, Nessa seeks comfort from Austin, but she isn't ready to give up and desperately clings to Adam. Will one night change the course of their friendship forever?