In the 1970s, a dam and hydroelectric plant were constructed in Sobradinho. The ruling military government believed the small northeastern town would be easily acquired, anticipating no local opposition. Consequently, 73,000 people were displaced – a massive forced migration in Brazilian history. Four cities and numerous villages were submerged. Mrs. Pequenita is the only person to ever return; she now lives in an abandoned town. She receives a visit from three social workers who bring old videos and photographs of the area.