Nobody ever talks to strangers on the train. It's a rule. But what would happen if they did? Every day at 8:05, Iona Iverson boards the train to go to work. Every day, she sees the same people and makes assumptions about them, even giving them nicknames. But they never speak. Obviously. Then, one morning, Smart-but-Sexist Surbiton chokes on a grape right in front of Iona. Probably-a-Psychopath-New-Malden steps up to help and saves his life, and this one event sparks a chain reaction. With nothing in common but their commute, an eclectic group of people learn that their assumptions about each other don't match reality. But when Iona's life begins to fall apart, will her new friends be there when she needs them most?