Horseracing has the reputation of being a sport ruled by and mainly for the wealthy — those unencumbered by the pesky constraints of regular, office-bred employment. As the relatively recent critical and crossover screen success of Seabiscuit proved, though, the same general rules of other underdog movies apply to tales of uplift set in the world of horseracing. The new family drama Dreamer is a bit less of an overt sports movie (it’s equally if not foremost about reconciliation and settlement), but it’s no less of a film than director Gary Ross’ 2003 Best Picture Oscar nominee, and in many ways much more of one. At once familiar and fresh, Dreamer is a stirring and heartfelt film that scores courtesy of a simple and sincere emotional investment in the material.