At head of title: Nickelodeon SpongeBob SquarePants
"Based on the screenplay 'Once bitten' written by Casey Alexander, Chris Mitchell, and Steven Banks."
"Based on the TV series SpongeBob SquarePants created by Stephen Hillenburg as seen on Nickelodeon"--T.p. verso.
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.