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 thehelp 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 himto "go with it| man." Would you trust John?