Riz Ahmed co-writes and stars in this drama set in New York and London. Up-and-coming rap artist Zed (Ahmed) is based in New York where he is making a name for himself and on the brink of a worldwide tour which is expected to launch him to stardom. However, when he returns to his native Britain to see his family he is struck by an auto-immune disease. As Zed's physical health declines his mental health also suffers as he struggles to contemplate the possibility of his once prominent career coming to an end.