16-year-old Craig (Keir Gilchrist), stressed out from the demands of being a teenager, checks himself into a mental health clinic. There he learns that the youth ward is closed - and finds himself stuck in the adult ward. One of the patients, Bobby (Zach Galifianakis), soon becomes both Craig's mentor and protégé. Craig is also quickly drawn to another 16-year-old, Noelle (Emma Roberts). With a minimum five days' stay imposed on him, Craig is sustained by friendships on both the inside and the outside as he learns more about life, love, and the pressures of growing up.