SpongeBob's pet, Gary, mysteriously begins to bite the residents of Bikini Bottom, and when word spreads that he has a rare disease called Mad Snail Disease, which turns those who get infected into zombies, SpongeBob runs to the Krusty Krab.
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.
