Natty Gann (played by Meredith Salenger) is a twelve year old Depression era girl whose single-parent father leaves her behind in Chicago while he goes to Washington State to look for work in the timber industry. Natty runs away from the guardian she was left with to follow Dad. She befriends and is befriended by a wolf that has been abused in dog fights, hops a freight train w...
为了完成父亲的遗愿，杰克（伊桑·霍克 Ethan Hawke 饰）只身来到了遥远的阿拉斯加寻找金矿。在这里，他遇见了善良友好的艾利克斯（克劳斯·马利亚·布朗道尔 Klaus Maria Brandauer 饰），两人决定结伴共同奋斗。
一只名叫白牙的阿拉斯加雪橇犬改变了杰克的命运，将他从死亡线上挽救了回来，而当白牙被赌狗的恶棍们当成摇钱树之时，杰克也毫不犹豫的对其伸出了援手。一人一狗之间，友谊和信任正在慢慢滋生。白牙靠着自己的天赋帮助杰克与艾利克斯找到了金矿，亦保护了金矿不被坏人夺走。当发了财的艾利克斯邀请杰克回纽约一起创业之时，面对依依不舍的白牙，杰克犹豫了。
