A brother and sister's reunion picnic at a stone circle in the English countryside is disrupted by the arrival of an uninvited guest. A brother and sister's reunion picnic at a stone circle in the English countryside is disrupted by the arrival of an uninvited guest. A brother and sister's reunion picnic at a stone circle in the English countryside is disrupted by the arrival of an uninvited guest. A brother and sister's reunion picnic at a stone circle in the English countryside is disrupted by the arrival of an uninvited guest.