Dave is surprised when David and Bob, a pair of old college friends and former singing partners, arrive to help him celebrate his birthday. Though having not performed together since 1988, Bob recalls making a pact to reunite their group, Chock Full O Notes, if none of them were married by age thirty-two. And while Dave tries to get out of it by claiming that the quartet isn't complete, their missing fourth member Brian shows up after a long drive from Arizona. Meanwhile, Lisa gets a bad reputation after she hurts Matthew's feelings. Despite Bob's quitting his job and Brian's canceling his wedding, David begins to suspect that Dave and the others don't want to reunite after all. However, just when Dave thinks he may be off the hook, Bob and Brian decline to back out on their agreement. When Dave can't bring himself to tell his old friends that he isn't really interested, Bill steps in and gives the three other members of the group his scathing opinion of their singing style. Meanwhile, Lisa continues to upset Matthew, leading Jimmy to suspect that they are having an affair. After being honest about his lack of interest in the reunion, Dave learns that David is only doing it because he doesn't want to disappoint their friends. But when Dave tries to get everyone to admit their true feelings, David fails to back him up. Meanwhile, Jimmy's efforts to keep Matthew's feelings intact at the office come to an end with the end of the work day. Finally, as they prepare to give him a musical good-bye, Dave's fellow Chock members find that they can no longer sing.