Online, any of us can become judge, jury – and executioner. In forums and threads, we seek the truth, hunt for clues, and point fingers at those we believe are guilty. But in this ever-shifting digital world, how do we draw the line between the rule of law, and a digital lynch mob? In this episode, an amateur sleuth seeks justice in the case of a young woman's mysterious death – only to discover that the accused killer is the real victim. Elsewhere, a digital activist takes a stand for social justice – only to find himself forced to choose between prison and exile.