Plot (Spoiler)

Brian and Stewie get locked in a bank vault and become trapped. Brian wakes up in the middle of the night and opens a bottle of scotch. When he accidentally wakes up Stewie, they share the scotch. While drunk, Stewie tells Brian that his life has no purpose, and Brian becomes infuriated. A fight ensues, and Stewie draws a gun from Brian’s safety deposit box in the vault. The next morning, Stewie asks Brian why he has the gun, and he reveals that he keeps it in case he ever wants to commit suicide. Shocked, Stewie asks why he is so unhappy, and Brian notes it is because his life has no purpose. Feeling sorry for him, Stewie says that he loves Brian, and he would not be able to live without him. They drift off to sleep, and the bank vault suddenly opens.