小学六年级学生正一利用小学最后一个春假，前往父亲居住的澳大利亚。但是，本应在一流商社工作的父亲荣二现在却辞去工作，住在南岛塔斯马尼亚。正一在悉尼街头游览了一番，在那里遇到了一个名叫实的少年。由于家庭情况复杂，刚离家出走的正一感到十分亲切。这时，一个自称是平岛直子的女人出现在他们面前，把正一和实领到荣二身边。但在那里与正一重逢的荣二参加了塔斯马尼亚的自然保护运动，正在追捕幻想的动物塔斯马尼亚虎。没有那样的呢?也不知道塔斯马尼亚虎追世界杯成为一头,有点超出了行动荣抱疑问,反对两正一,不知不觉就这样荣二的身影,有的会感受到的。春假即将结束的时候，正一和荣二一起寻找塔斯马尼亚虎。正一和荣二通宵达旦。天亮了，正一在森林里流浪，他看见了背对朝阳的塔斯马尼亚虎。

Eiji Kawano (Kunie Tanaka) has recently broken from the Japanese company he used to work for. As an immigrant to Tasmania, he has been won over by the island's immense natural beauty, and he is conscience-bound to oppose his former employer's ecologically unsound practices. He is also estranged from his grown son, who still resides in Japan. When his son comes to Tasmania for a visit, he must face the challenge of renewing their relationship.