Hotel night clerk Bart Bromley (Tye Sheridan), a highly intelligent young man on the Autism spectrum, uses secret surveillance cameras to record guests in an effort to improve his social interaction skills. When a woman is murdered during his shift, Bart becomes the prime suspect but cannot reveal that his illegal cameras captured evidence that would prove his innocence. As the police investigation closes in, Bart makes a personal connection with a beautiful guest named Andrea (Ana de Armas), but soon realises he must stop the real murderer before she becomes the next victim.