Paul Groves (Peter Fonda), a television commercial director, is in the midst of a personality crisis. His wife Sally (Susan Strasberg) has left him for another man and he seeks the help of his friend John (Bruce Dern), a self-styled guru and advocate of LSD. Paul asks John to be the guide on his first "trip". John takes Paul to a "freak-out" at his friend Max's (Dennis Hopper) pad. Splitting the scene, they score some acid from Max and return to John's split-level pad with an indoor/outdoor pool. Paul experiences visions of sex, death, strobe lights, flowers, dancing girls, witches, hooded riders, a torture chamber, and a dwarf. Most prominent among his hallucinations, however, are two women: Sally, his memories of which, both good and bad, he cannot so easily let go of, and Glenn (Salli Sachse), an acquaintance of Max's whom he has only just met but feels an immediate connection with, as she admires those who dare to try LSD and wishes to see him again soon. He panics, but John tells him to "go with it, man." Would you trust John?—alfiehitchie