1960s movie about two guys that rode with up to the lake

Wyatt and Billy, two Harley-riding hippies, complete a drug deal in Southern California and decide to travel cross-country in search of spiritual truth.

The chronicle of the mind-blowing journey that was Hollywood during the seventies; the true and gripping story of the last golden age of American cinema, an exalted celebration of creativity and experimentation; but also of sex, drugs and rock 'n' roll: a turbulent and dark tale of ambition, envy, betrayal, hatred and self-destruction.

Two guys bought a car and travelled through the country untill they met a lonely girl on the road. So they begin to travel together having so much fun. And there is another guy who has a better car and who is looking for the girl because he is her lover, he is her first one. What is going on inside of this girl? Nobody knows, until the end.