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?"
It would be impossible for the submarine's windshield to be unscathed after smashing through Sandy's dome due to them supposedly both being made of the same polyurethane material.
The submarine could not have moved while in the treedome as there was no water in it.
When SpongeBob is looking around and sees Patrick's house, neither Squidward's nor SpongeBob's house is shown.
When the submarine runs out of fuel and crashes, SpongeBob can clearly be seen inside the cockpit, piloting the submarine. In the next shot, when the fuel alarm goes off, he is in the bathroom, shaving.