Jeo and Mikal are foster brothers from a small town in Pakistan. Though they were inseparable as children, their adult lives have diverged: Jeo is a dedicated medical student, married a year; Mikal has been a vagabond since he was fifteen, in love with a woman he can't have. But when Jeo decides to sneak across the border into Afghanistan--not to fight with the Taliban against the Americans, rather to help care for wounded civilians--Mikal determines to go with him, to protect him.