After playing an exhausting computer game, Leonard goes to greet Penny with her mail, which he took on the pretense of talking to her. He catches her with a pretty boy and is immediately disheartened.
His friends try to cheer Leonard and encourage him to go out with a woman more his speed. Leonard settles on Leslie, a woman he works with at the lab. She proposes an experiment - that Leonard kiss her - to determine any compatibility they might have. Although a good kisser, Leslie lets Leonard know that she was not aroused. Thus, they do not go out.
Fed up by his roommate's whiny music and affinity for cat-shopping, Sheldon tells Leonard that he has a problem. Leonard agrees, and determines that he should just ask out Penny. Instead, he asks Penny to dinner, but doesn't let her know that the rest of the group will not be there.
At dinner, Leonard and Penny find little to discuss. When he shows her a trick with a glass and an olive, Penny starts to warm to Leonard, but at that moment, he is injured. They return home; when Penny asks Leonard if the night was meant to be a date, he denies the accusation.