SpongeBob and Patrick convince Mr. Krabs to join in a friendly board game of "Treasure Hunt". Even a pretend search for gold proves too alluring for Mr. Krabs, who convinces the two lads to join him on a real treasure hunt. The boys threaten mutiny when they realizes Krabs' map is a fake, that is until they discover real treasure and its real owner! SpongeBob accidentally gets on the wrong bus, he finds himself lost in an unfamiliar and mysterious part of the sea called Rock Bottom. Nervous and unable to communicate with these strange creatures and their strange language, SpongeBob must learn to adapt to this new environment so he can figure out how to get back home.