On a hot, wet summer night in South Carolina, a mother and son are shot and killed on their family's hunting estate. Detectives collect evidence at the scene as rain falls over the farm and the only witness is interviewed -- husband and father, Alex Murdaugh. As the case unfolds, investigators unravel the façade of a longtime respected attorney and usher in the undoing of a Lowcountry legal dynasty. But is Alex capable of double murder?