After a brutal assault by an obsessed fan, a celebrated crime novelist retreats into the suffocating confines of her apartment, desperate to rebuild her shattered life. But isolation breeds paranoia as the walls close in, and reality begins to fray at the edges. What starts as unsettling noises and fleeting shadows soon escalates into a waking nightmare, where every memory is suspect and every shadow hides a threat. As her trusted psychiatrist struggles to anchor her, she must confront a harrowing question: is the danger outside her door, or has her own fractured mind become the most terrifying monster of all?






























































