When drug dealer Mickey mysteriously collapses while negotiating a sale, his partner-in-crime, Eddie, accompanies him to Princeton Plainsboro for treatment. But with a major deal pending, Mickey is not forthcoming with the necessary personal information the team needs to treat him. As Mickey’s condition worsens, the team resorts to old-fashioned detective work to solve the case. Meanwhile, House and Wilson compete for the affection of a new neighbor, and Chase, Thirteen and Taub attempt to play a practical joke on Foreman.

The team tries to diagnose a woman’s fiancee, and she’s surprised to learn the secrets that he’s been keeping from her. Meanwhile, House decides to spend some musical free time with Chase and Foreman.

The team takes on the case of an ailing groom-to-be who harbors undisclosed secrets from a previous relationship. As his fiancée tries to get answers to her many questions, a frustrated team winnows down the possibilities. Meanwhile, House spends extra-curricular time with his Princeton Plainsboro colleagues, performing a karaoke rendition of a Gladys Knight & The Pips classic with Foreman and Chase.

A family copes with a sick daughter and a dying son, and the team must diagnose the daughter before its too late. Meanwhile, House deals with an elderly father and son, and tries to deal with the challenges of a workplace romance.