Hao is part of a team of young engineers called in to investigate a series of craters that have opened up on the edge of the city. As he and his team survey the subsiding area, another story is taking place in the same suburban landscape. A younger boy, also named Hao, spends long afternoons playing with friends and making mischief until one by one, his playmates start to disappear. As these parallel stories unfold, the connections between them proliferate and grow stranger.