The love story between Rick and Anna and Barry follows the same path as the love story of Casablanca's Rick and Isla and Victor. Rick and Anna met, fell in love, she was gone without reason. She finds her way into Rick's bar hangout and sees Rick's best friend and has him play Rick and her song. Rick hears the song and gets angry. Then there is the fact she also has another man in her life, Barry. Rick is determined to get her back but then sees her life will be better with Barry and does the noble thing and makes her go with Barry. There are several variations on direct quoting from Casablanca also, ie: "We'll always have Pedro el Horny's...".