Directed by Richard Linklater, A Scanner Darkly stars Keanu Reeves, Robert Downey Jr., Winona Ryder and Woody Harrelson in an animated sci-fi film based on Philip K. Dick’s book A Scanner Darkly. Set in a near-future surveillance society shaped by addiction and identity breakdown, the film follows an undercover agent whose work and private life begin to collapse into paranoia. Its rotoscoped animation style gives the story a distinctive visual identity while keeping the focus on technology, drugs, surveillance and fractured perception.

Från IMDB:
An undercover cop in a not-too-distant future becomes involved with a dangerous new drug and begins to lose his own identity as a result.