SpongeBob is explaining to the viewers that the Bikini Bottom Jellyfish Trauma Center is where fish go to get treated for their jellyfish stings. As SpongeBob walks through the building, he accidently steps on Plankton thinking he is a pickle. SpongeBob picks up Plankton and now notices him and wonder what's Plankton doing there. Plankton says he is at a trauma center but SpongeBob offers him flowers. Plankton says that he is allergic to the flowers and turns pink in color. Patrick, in a nurse's outfit, suddenly appears and puts Plankton on a gas mask. SpongeBob wonders what is Patrick doing there and Patrick says that he is doing community service. Plankton suddenly inflates like a balloon and flys out of the Trauma Center. Plankton is glad to be away from SpongeBob and Patrick but Plankton soon bumps into a swarm of jellyfish.
It is revealed in this episode that Plankton is allergic to flowers, most notably Chrysanthemums. This is also seen in Fiasco!
This is the second time Plankton gets shocked by jellyfish. The first was in the episode SpongeBob's Last Stand.