在这部月光之子片中,保罗梦想成为一名宇航员。但这个患了皮肤癌的孩子无法像正常人那样接触阳光，与外界的隔离和对正常生活的渴望使他孤僻叛逆。姐姐丽莎告诉保罗说他是从月球来的孩子，因为不能适应地球的环境才要受到特殊的保护。但这个美丽的谎言也无法让保罗快乐起来，特别是在丽莎的初恋西蒙出现以后。丽莎既要照顾弟弟又要维护自己的恋情，分身乏术，妒嫉和猜疑也随之而起。直到误会被渐渐解开，西蒙决定和丽莎一起让保罗感受到最后的幸福，但因为病情的恶化，保罗的生命已所剩无几……
Paul wants to become an astronaut. It is his favourite game. Pauls older sister, Lisa is playing his assistant in the spaceship. Lisa meets Simon and he also joins in but when Paul's physical conditions becomes bad, the game needs to favour Paul..
启程与告别。。
