Benny (Wes Bentley) and Nathan (Ryan Donowho) are brothers who live on the Anderson Ranch which boasts some Indian burial grounds. Benny has a friend , Delgado (Christian Slater) who stays there and manufactures drugs. Both Delgado and Benny made a powerful hallucinogen from the root of gypsum. Benny does things under the influence of the drug he doesn't remember, regrets and can't fix.
Nathan invites the anthropology class out to the ranch while a bunch of crazy stuff is going on. Soon they all drink the Gypsum tea and all hell breaks loose. The movie has some humorous moments, but is far from a comedy.
F-bomb, sex, no nudity but a lot of bikini/bra and panties stuff, derogatory toward Christianity in the beach scene. 3 1/2 stars