In 2013 a psychiatric clinic which served for more than 50 years caring for patients in Mexico City was demolished. A few months before its demolition, four young men came to investigate the clinic, determined to discover the truth about rumors of strange and paranormal events, recording everything with which they encounter. Today, the whereabouts of these four young men are unknown, remaining only fragments of their recordings.

In order to save her son’s life, Ana embarks on a quest to find a powerful stone from the Zone of Silence, located in Mexico. Someone finds out the power the stone possesses and believes it is a power worth killing for.