西莉亚 (Patricia Clarkson 饰) 感觉自己人生处在了一个十字路口上。她和丈夫已经成功跻身美国富人阶层，在加州塔霍湖边有一栋自己的别墅，一对儿子也已长大成人。就在这个劳工节周末，大儿子西奥（Zachary Booth 饰）决定带男友到别墅度假，二儿子罗杰（Joseph Cross 饰）也带着秘密回家。被亲朋好友包围的西莉亚始终觉得生活缺少了什么，直到静谧湖水旁发生的意外惊醒了她。她需要的是往前走......

Scattered around the world are long-forgotten engineering marvels, decaying cities and empty factories that once stood on the cutting edge of design and construction. Today they are discarded, dangerous, and some of them are even deadly. "Mysteries of the Abandoned" reveals why these engineering triumphs were built and how they were left to crumble. In each hour long episode, stories tell of who originally designed the structure, its historical significance, and why it was ultimately no longer viable. California's Goat Canyon Trestle railway, Pennsylvania's Kinzua Viaduct steel bridge, the Grand Goulets Road in the French Alps, and Hashima Island, a once thriving and now deserted Japanese island, are among episode subjects.