He could go shopping, to the movies, or to the disco, but he had to get home before his parents (he had no freedom). He could fall in love, but his girlfriend mysteriously broke up with him. It was only when he saw her boarding a flying saucer that he knew she was an alien (the gulf between two people).
主人翁雖然可以逛街購物、看電影、跳迪斯可，卻又必須趕在父母之前回家開門（無法自由）；他可以談戀愛，卻莫名其妙和女友分手，直到他看到她乘飛碟離去，才知道原來她是外星人（兩人世界的鴻溝）。