If you go to Ireland and catch the bus to Ballycastle, there by the sea you'll find the Giant's Causeway. This is the story of how the causeway was made and it all starts with Finn McCool, the biggest giant in Ireland, who sets out to find an even bigger giant across the sea in Scotland. But Finn doesn't always have the best ideas and it's up to his wife Oona to come to the rescue when the Scottish giant follows Finn back home...