One day, a cataclysmic event occurs: all of the white people in America walk into the nearest body of water.
A year later, Charlie Brunton is a Black man living in an entirely new world. Having served time in prison for a wrongful conviction, he's now a professor of electric and solar power systems at Howard University when he receives a call from someone he wasn't even sure existed.
His daughter Sidney, a nineteen-year-old left behind by her white mother and step-family. Traumatized by the event, and terrified of the outside world, Sidney has spent a year in isolation in Wisconsin. Desperate for help, she turns to the father she never met, a man she has always resented. Sidney and Charlie meet for the first time as they embark on a journey across a truly 'post-racial' America in search for answers.