Twins Sophie and Adam Blake return to the halls of Chillsville Elementary as they prepare to welcome newcomer Batsy Fangly with an excitingly spooky Monster Bash. With large ears and pointy teeth, newcomer Batsy Fangly is the strangest person to ever grace the halls of Chillsville Elementary. Despite her spooky appearance, the kids of Chillsville welcome Batsy the best way they know how: a Monster Bash. But when Sophie and Adam show up to the party in their best clothes, only to discover everyone else is in their scariest costumes, they aren’t sure how to fit in. Trying their hardest to be like everyone else, Sophie and Adam muster the courage to take a trip through the haunted house… and try their hardest to survive.