Ten-year-old Rhys really loves dogs. When he finds a lost black Labrador with big conker eyes and ears like soft velvet, he can't quite believe his luck. Nobody comes forward to claim Worthington, giving Rhys the perfect opportunity to prove he's a good owner. But when Rhys moves to London to live with his estranged dad who hates dogs, Rhys decides to keep Worthington secret. Struggling to connect with his dad in a new city, Rhys takes comfort in Worthington. But he soon discovers that looking after a secret dog is anything but easy, and he knows that before long he'll have to confront his fears and find a way to tell Dad.