SpongeBob says hello to Patrick. They blink at each other for a bit then SpongeBob decides that they should play hide and seek. However, Patrick doesn't know what hide and seek is, so SpongeBob tries to explain to him what hide and seek is, but fails. SpongeBob then does it in a sock puppet version but Patrick still doesn't know how to play. They then start the game anyways, but Patrick quits before SpongeBob finishes counting, and goes to his home. SpongeBob then finishes counting and starts looking for Patrick. He looks for Patrick at Squidward's house, under the Krusty Krab sign, and at Mrs. Puff's Boating School. Then he goes to look for him at Sandy's house. Sandy catches SpongeBob looking for Patrick and she gives him a submarine to look for Patrick. SpongeBob then goes on an adventure in the submarine before running out of fuel in a stormy area. He begins walking and bumps into a sign, welcoming him to a cafe and gift shop called The End Of The World. He goes inside and asks the clerk if he's seen Patrick. The clerk points to a pink starfish and SpongeBob thinks it's Patrick. However, the pink starfish explains that he is Patrick Not-Star
and SpongeBob starts crying because Patrick won at hide and seek. However, Patrick Not-Star explains to SpongeBob that games are about having fun, so SpongeBob cheers up. SpongeBob then walks over to Patrick's rock and leaves him a note saying how he's good at Hide And Seek. At that moment, Patrick comes out of his rock and SpongeBob realizes he was under there the whole time. Patrick then reads the note and thanks SpongeBob. Patrick then tells SpongeBob he has another question and he asks SpongeBob "What's Hide And Seek?"
Patrick is shown not to know how to play hide and seek, but in "Wormy," he already knows how. It's also possible it happened after Wormy because SpongeBob told him they played it dozens of times and he still didn't know what it was. They also played Hide and Seek in "Buried in Time."