When Kelsey remarries, her struggle to get custody of her daughter from her first marriage is complicated by her current husband being black.

一个英国女孩（Nicola Cowper饰）在夏威夷被卷入两个男孩（Ilan Mitchell-Smith与Paul Carafotes饰）的探险。他们在一处荒废的海滩钻进一个洞穴，不料遇到火山喷发，出路被堵死，但洞里也震开了一道裂缝，里面竟有一条远古通道一直向下延伸。最终他们在地底发现了失落的亚特兰蒂斯城。