Charlie surprises everyone when she tells them that she and her latest boyfriend, Kirk, her college professor, are getting married the following week. Rodney, who has his own suspicions about Kirk, gets another surprise when he sees Carl, his father-in-law, being more friendly to Kirk than he has ever been to Rodney, and the two finally have it out about their relationship.

On Valentine's Day, which is also Charlie's wedding day, Rodney wants to get Trina the engagement ring he couldn't afford when they got married. But the jeweler makes a mistake and the diamond for the ring ends up in a very unusual place! Meanwhile, Charlie wonders if she and her fiancée, Kirk, can look forward to the same fun and loving relationship that Rodney and Trina have.