Flashback

Directed by Christopher MacBride

With Dylan O'Brien, Hannah Gross, Emory Cohen, Keir Gilchrist and Maika Monroe

Frederick Fitzell is living his best life—until he starts having horrific visions of Cindy, 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.