The plot deals with the conflicting relationship between the narrator and Mr. Kelada; with the relationship between Mr. Kelada and Mr. Ramsay.
       Mr. Kelada and Mr. Ramsay discuss nature-made pearls and cultured pearls, then they bet whether Mrs. Ramsay's necklace is made of real pearls or an imitation.
       Relationship between Mr. Kelada and Mr. Ramsay serves to bring the complications of the plot to its climax and solution. I mean, that is, after the narrator discovers that Mr. Kelada is in fact a gentleman (despite his vulgar manners) he changes his opinion about him.