Plankton's annual Halloween party at the Chum Bucket has flopped yet again — not a single guest. Furious, he decides that if he cannot have a party, no one else can: his Plankt-O-Lanterns now block every street in Bikini Bottom. SpongeBob and friends race to dismantle the blockade, collect candy, and save the holiday before the last trick-or-treater gives up.