Half Nelson synopsis
Dan Dunne (Ryan Gosling) is a history teacher at a Brooklyn school. Though well-liked by his students and colleagues, he secretly spends his evenings hopping bars and getting high. A female student named Drey (Shareeka Epps) catches him in a drug-induced haze after a basketball game, and the two strike up an unlikely friendship. As Dan struggles with his addiction, he tries to act as a mentor to the girl, whose brother is serving time for dealing drugs.