Flashback

Fredrick Fitzell (Dylan O'Brien, The Maze Runner franchise) is living his best life - until he starts having horrific visions of Cindy (Maika Monroe, It Follows), a girl who vanished in high school. After reaching out to old friends with whom he used to take a mystery drug called Mercury, Fredrick realizes the only way to stop the visions lies deep within his own memories, so he embarks on a terrifying mental odyssey to learn the truth.