Ever Barnes is an orphan who guards an ancient, family secret in the intricate puzzle-like building in the city of Oskar. The women who work in the Switchboard Operating Facility keep an eye out for Ever, some more closely than others. He hasn’t spoken to someone in years, until he meets Hannah - the daughter of the building owner. Resistant to the idea of friendship at first, Ever soon warms up to Hannah as they work together to uncover the secret his family has kept about the building before someone else does. The future of the city of Oskar depends on them.