Joe is a charming modern-day "caveman" who likes one night stands, no strings, no complications. Julie is bright and friendly, but has drifted toward one night stands because she's been hurt in relationships. Joe and Julie meet in a bar and drive to her place. They start to have wild sex in her bathroom, but an argument about condoms stops them. Roommate Cindy and her friend Crystal arrive and flirt with Joe, further angering Julie. When they leave, Joe and Julie glare at one another. Then they surprise each other. They begin to talk. They talk all night, about sex, relationships and more sex. Finally, examining their own lives, they discover something about each other and become friends.