A Scanner Darkly (2006)
Everything Is Not Going To Be OK

Overview
In the near future, Bob Arctor is an undercover cop trying to stop the supply chain of the hallucinogenic Substance D. Arctor and the other undercover cops as well as Arctor's superior, Hank, wear devices called scramble suits that hide their identities. Arctor reports to Hank under the name of Fred. Arctor stays in his decaying suburban California house with other addicts growing increasingly addicted himself and paranoid. His sense of identity fragments and he no longer has a sense that Fred and Arctor are the same person particularly after Hank orders Fred to spy on Arctor believing him to be a drug ringleader. Arctor descends further into paranoia as it becomes increasingly clear that no one and nothing is who they seem to be.