在这部最后的雨林动画/冒险/家庭片中,生活在芬谷林的精灵们的世界一度很大，但因为人类的破坏，大自然失去了平衡，森林几乎被毁灭。很多年后，随着时间的慢慢推移，森林逐渐恢复生机，作恶多端的恶魔奥克斯也被囚禁于大树之下。也是从那以后，芬古林再也没有出现过人类，精灵们也过着悠闲的生活。仙女克瑞斯在一个偶然的机会下，飞出密林，见识到了她从未看见过的世界。并把黑烟囱的事情告诉了芬谷林的先知瑞切。
芬谷林的上方笼罩着不祥的烟雾，瑞切知道人类的破坏和污染又开始了。一只头脑不清醒、语无伦次的蝙蝠无意中闯入了芬谷林，带来了人类破坏自然的坏消息。克瑞斯抑制不住好奇心，决定飞去看个究竟。克瑞斯从来没有见过人类，当她看到了人类——年轻的伐木工扎克时，却阴差阳错把他变成了和自己一样大小。但是芬谷林有了麻烦，扎克所在的伐木队要对这个森林进行砍伐。
更糟糕的是，无意中伐木队解放了被囚禁在树木中恶魔奥克斯。危险一天天逼近，但生活在芬谷林的精灵们对此却毫无察觉。被带到芬谷林的人类扎克逐渐适应了变小的自己，与克瑞斯等人也成为了好朋友。原本对树木不爱惜的他在克瑞斯实际行动的感召下，慢慢具有了爱护树木的意识。同时，他也认识到自己所在的伐木队正在做一件多么错误的事情。
伐木队被恶魔奥克斯所控制，意图毁掉芬谷林。许多树木遭到了人为的破坏，扎克十分难过，决定尽力组织这一切。先知瑞切为了挽救树林，情愿牺牲自己，把生长的力量分给了其他精灵。面对强大的奥克斯的侵犯，扎克和全部精灵齐心合力，终于保卫住了森林。而扎克最终也变回了正常大小，但从此以后他作为人类的一员，将为保护森林而做出终身的奋斗。
The fairies live in a peaceful place in the forest called Fern Gully which has been protected for many years by Magi, a wise fairy with strong powers. Her grand-daughter Crysta is a charming, beautiful fairy that is very intrigued about the world outside of Fern Gully. She along with the other fairies in the forest do not believe humans exist and are only in stories, until a crazy bat by the name of Batty, comes and tells them all these crazy stories about how he was captured by humans and experimented on. At first no one believes him except Crysta and she is determined to find out if humans are real. She goes to a place called Mount Warning, where the evil shadow of destruction Hexxus is known to be trapped, and finds a human named Zak. When he is almost crushed by a tree Crysta accidently shrinks him to fairy-size and he falls on a tree that is about to be devoured by "The Leveller". "The Leveller" is a wood cutting machine that has been cutting down every tree the humans have been putting red Xs on. Crysta saves Zak from "The Leveller" which she thinks is just a monster but she cannot properly un-shrink him. To avoid her being mad at him Zak tells her that the red Xs keep the monster back instead of what they are really there for, which is to pick which trees to cut down. They decide to take Zak to Magi so she can un-shrink him, on the way Zak sees the forest really for the first time with all its beauty and life. Back toward Mount Warning the humans have accidently released Hexxus who is set on destroying Fern Gully, he uses "The Leveller" to cut down all the trees to Fern Gully. When Crysta, Zak and Batty make it back to Fern Gully the fairies cannot believe the Zak is really a human and they all excited to see him and learn about him. The only one who is truly worried is Magi, she goes to check on the path to Fern Gully and sees that it is beginning destroyed and Hexxus is coming this way. She shows Crysta the red Xs and tells her the trees cannot be saved. With Hexxus drawing closer and closer to Fern Gully, Magi calls for all the fairies to come around to tells them of the danger. She uses the last of her magic to try and protect Fern Gully.
童话。一起来看吧。
