On Valentine's day, 1900 group of young women from an exclusive boarding school are treated to a picnic in the bush. It is a lovely day, and the girls are excited at the chance for a break from their daily routine. But, when four girls go for a walk for a closer look at Hanging Rock, tragedy strikes. Three of the four fail to return and Edith, the one who does, has no recollection of what befell her friends. At the same time one of the teachers accompanying the girls also disappears. In the days and weeks following the mystery surrounding their disappearance grows, and the subsequent effect ripple throughout the community.