Naïve young rodeo rider Bo (Don Murray) falls in love with Phoenix-based café singer Cherie (Marilyn Monroe), whom he meets on a bus. His intentions are honorable, but his temper and jealous streak are too much for her. When she tries to run away, Bo finds her and forces her to board the bus to his Montana home. When the bus stops at Grace's Diner, their fellow passengers learn that the road ahead is blocked and that Cherie is being kidnapped.