Paul Groves (Peter Fonda), a television commercial director, is in the midst of a personality crisis. His wife Sally (Susan Strasberg) has left him and he seeks the help of his friend John (Bruce Dern), a self-styled guru who\'s an 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 pool. Paul experiences visions of sex, death, strobe lights, flowers, dancing girls, witches, hooded riders, a torture chamber, and a dwarf. He panics but John tells him to \"go with it, man.\" Would you trust John?