A turbulent affair between a teenage boy and his math teacher is brought to life from the surprising perspective of the boy’s best friend: his cell phone. Red McCray is a troubled fifteen-year-old, furious that his parents’ split has forced him to transfer schools. His new algebra teacher has just moved in with her boyfriend, a wannabe tech entrepreneur happily living off her steady paychecks. As Red’s phone gets sucked into a breakneck journey from pockets to purses, and through text messages and photo galleries, it takes us inside an utterly unique view on human interaction, struggling to unpack some of life’s most complex equations.