Iolo Williams finds amazing wildlife in a once-abandoned old industrial site turned urban park on the coast of Anglesey. Holyhead Breakwater Country Park is now a pleasant escape for people and a place where he discovers sparrowhawks, little owls and the charismatic chough. He has a magical encounter with a weasel and gets up close to grasshoppers. In late autumn, filming coincides with the tail end of Hurricane Gonzalo, giving a chance to see the grey seals frolicking in wild seas.