Adopted at birth, Joe Broughton (Christopher Eccleston) is overwhelmed by an obsessive desire to trace his real parents after the birth of his daughter Marie. When he discovers that his mother and father are learning disabled and never knew they had a child, his world is blown apart. For Joe as well as his wife Cath (Emma Cunniffe), it's the beginning of a rollercoaster journey which challenges not only his preconceptions about disability, but also his sense of his own identity.