The Horse Latitudes.

Philly is deeply troubled by the fact that his mother recently sent his older brother Morris to live at a mental health facility. While wandering about on a day that he decides to skip school, Philly learns of one particular historical incident that sheds new light on his brother's and mother's predicament. The Horse Latitudes is a psychological drama that probes popular perceptions of "conformity" and "freedom", and asks what it takes to be functional.