The Nick Jr. friends—Bubble Guppies, PAW Patrol pups, Blaze the Monster Truck, and Shimmer and Shine—gathered for a joyful playdate, chasing balls and sharing snacks on the lush green grass. "This is the best day ever! Let's race to the slide and see who gets there first—ready, set, go!" exclaimed Bubble Guppies, their colorful fins flipping excitedly. "Woof! We're right behind you, and nothing can stop our paws from winning this race!" barked PAW Patrol pups, tails wagging furiously as they bounded forward.

Suddenly, a translucent white figure with glowing red eyes materialized near the old oak tree, its tattered sheet billowing like mist, accompanied by chilling wails that rustled leaves and sent chills through the air. Blaze skidded to a halt, engines revving nervously, while Shimmer clutched her magic necklace, eyes wide in terror. "Eek! What is that spooky ghost doing here? It's floating right towards us with those scary eyes—everybody run for your lives before it catches us!" screamed Shimmer and Shine, her voice trembling as the group scattered in panic.

The friends dashed through thorny bushes and over bumpy hills, hearts pounding, the ghost's eerie moans echoing closer, its shadowy form gliding effortlessly behind them in pursuit. "I can't believe it—a real ghost in our park! It's gaining on us, and I don't know where to hide; this is the scariest thing that's ever happened during playtime!" gasped Bubble Guppies, bubbles popping frantically. "Stay together, team! But that ghost is super fast—let's zoom to Umi City and get help from our math superheroes before it turns us into ghosts too!" urged PAW Patrol pups, leading the frantic sprint.

Panting and huddled at Geo's door—Geo, the pint-sized math whiz with his trusty toolbelt and Umi Alarm— the friends banged desperately, shadows of the pursuing ghost looming in the distance. Geo opened the door, his big eyes blinking in surprise, Milli and Bot peeking curiously from behind. "Geo, you have to help us right now! We were playing in the park when a terrifying ghost with glowing eyes appeared out of nowhere, chased us all the way here, and we think it's going to haunt us forever!" revved Blaze, tires spinning anxiously.

Geo activated his UmiZoomi powers, projecting holographic clues from the park—footprints, fabric scraps, and a trail of glowing powder—while his friends watched, tension thick in the air humming with possibility. "Don't worry, Nick Jr. friends, we'll solve this mystery with super math powers! Look at these clues: the ghost's trail matches a sneaky pattern of three steps forward, two back, and the fabric is from a costume shop nearby—let's pattern our way to the truth!" declared Geo, rallying everyone with shape-stacking enthusiasm. "You're so brave, Geo! We've been so scared, but your math magic makes us feel like we can figure this out together as a big team." cheered Bubble Guppies.

Following Geo's pattern clues, they cornered the "ghost," which stumbled comically, shedding its disguise to reveal Dora's cousin, Diego—the adventurous animal rescuer with a sheepish grin and paint-smeared clothes from a botched Halloween prank setup. "Oops, it was just me trying to surprise everyone for a fun Halloween early! I didn't mean to scare you so bad—the wind caught my sheet, the flashlight eyes malfunctioned, and I couldn't stop the chase; I'm so sorry, friends, let's turn this fright into a fiesta!" laughed Diego, hugging the relieved group. "See? Math and teamwork always reveal the real story—no ghosts, just friends having too much fun! Now, who's ready for ice cream under the stars?" beamed Geo, as cheers filled the night.