SpongeBob and Patrick can't wait to see Clamu, the giant oyster at the Bikini Bottom Zoo; but when Clamu won't wake up, SpongeBob throws a peanut at him.
After SpongeBob's pet Gary starts biting everyone, a rumor spreads through town that he has a rare snail disease, and as the Snail Bite panic builds, everyone's zombie-like behavior leads to a manhunt for Gary.
When SpongeBob gets stuck in the freezer with the gang just minutes before the Krusty Krab's celebration of its anniversary, Plankton winds up stealing the Krabby Patty recipe--for real!.