When River abandons their small town to chase stardom in Los Angeles, Adam expects to maintain their lifelong bond through letters and calls. Instead, River vanishes without trace, leaving Adam no choice but to abandon his quiet life and pursue answers across the country. His investigation leads him to MAN-ticore Video, an exclusive studio operating in the shadows of the entertainment industry, where a guarded director seems to know far more than he'll reveal. Dismissed by authorities and stonewalled by River's own family, Adam infiltrates the operation undercover, unprepared for the nightmare of violence and depravity he's about to uncover. As the truth spirals into increasingly horrific territory, Adam must decide how far he's willing to go—and what he's willing to become—to bring his friend home, all leading toward a deadly confrontation that transforms into something far more catastrophic.