When Dian was six, she narrowly escaped a tsunami of boiling mud that completely submerged 16 villages under a moonscape of grit, leaving 60,000 people displaced. Lapindo, an Indonesian drilling company, had unleashed a violent, unstoppable flow from the earth's depths, estimated to continue for another decade. Shot over six years, GRIT witnesses Dian's transformation into a politically active teen, as she and her mother take on the perpetrators.