A new one-off documentary exploring the fascinating fantasy world of Britain's 'adult babies', revaling why some fully grown adults choose to embrace an alter ego that allows them to dress in a onesie, have their nappies changed and generally be cared for like a baby. With access to adult babies and the 'nurseries' they attend, both in the UK and USA, the film explores the motivations behind the adult babies' actions, as well meeting the 'mummies and daddies' who tend to their needs.