Upstream Color

Upstream Color is a 2013 film written, directed, produced, edited, composed, designed, cast by and starring Shane Carruth. The film is the second feature directed by Carruth, best known for his 2004 debut Primer. Upstream Color stars Amy Seimetz, Carruth, Andrew Sensenig, and Thiago Martins.

The film starts with a man mentioned in the credits as the Thief who appears to be harvesting a type of larva for the unusual effects it has on the human mind when ingested.At a club, Kris Amy Seimetz is tasered and kidnapped by the Thief. He drugs her with a strange capsule, inducing a sort of hypnotic susceptibility, which causes an extremely suggestible mental state that the Thief then exploits. He uses an elaborate set of distractions, such as getting her to create a paper chain where each link features a transcription from the book Walden, in order to distract her while performing his mind control. He eventually manipulates her to liquidate her home equity and steals a valuable collection of rare coins. Through hypnotic suggestion, Kris is prevented from consuming solid foods. She is only allowed to drink small portions of water at regulated intervals, which she is compelled to perceive as extremely refreshing and delicious. The capsule administered to Kris contains a live larva found among the leaves of the Thiefs special, bluetinged orchid flowersa larva that presumably is infected with a roundworm that subsequently infects Kriss system. She is released from her suspension of hunger by the Thief, presumably to trigger the onset of roundworm growth. Kris binges ravenously and falls asleep in soiled clothes. She awakes in her home to find one of several large roundworms visibly crawling under her skin. She unsuccessfully attempts to remove them by using a kitchen knife. ........

Source: Wikipedia