Twins, Julia and John wish they lived in a house like their grandmother's former home in Ireland. Their friend, Greg, paints a house for them on paper. When they go outside, they see the house and are able to visit it. Greg makes modifications as required. On their imaginative journey, the twins break many social rules - for example, peering in windows, trespass - and receive the unheeded advice: 'I wouldn't if I were you'.
