On October 9, 1963, the Vajont Dam in northern Italy was the scene of incredible devastation. In just 45 seconds, a massive landslide of forest, earth and rock collapsed into the reservoir, sending an 820-foot-high wave of water flowing towards the dam wall. This tsunami of water blasted over the top of the dam, crashing into the valley and rushing towards the villages below, where thousands of unknowing residents were living. Follow the journeys of a handful of men, women and children who found themselves in the path of disaster.