Due to a weather problem a plane from Denmark is forced to land at the Slovene airport. Amongst the passengers, being taken to a hotel in Ljubljana, is a quiet, beautiful young Danish girl Iben (25). This is how she meets Tina (25) who drives a shuttle as a summer job. They both need each other, but are very careful because one of them is hiding a secret. They speak to each other in English and in their native languages. Only one of the two languages has the so-called dual, a special grammatical form used in expressions that involve just two subjects. The other language does not. Dual is an honest story about two people who meet precisely at the moment when they absolutely should not have - but they are nevertheless a bit happier because they did.
八公（Forest 饰）是一条谜一样的犬，因为没有人知道它从哪里来。教授帕克（理查·基尔 Richard Gere 饰）在小镇的火车站拣到一只走失的小狗，冥冥中似乎注定小狗和帕克教授有着某种缘分，帕克一抱起这只小狗就再也放不下来，最终，帕克对小狗八公的疼爱感化了起初极力反对养狗的妻子卡特（琼·艾伦 Joan Allen 饰）。八公在帕克的呵护下慢慢长大，帕克上班时八公会一直把他送到车站，下班时八公也会早早便爬在车站等候，八公的忠诚让小镇的人家对它更加疼爱。有一天，八公在帕克要上班时表现异常，居然玩起了以往
