When Carmen steals famous gifts from around the world, Zack and Ivy are puzzled- especially since her clues are in the form of a scavenger hunt. Suddenly, the detectives realize why Carmen is doing this. It's her birthday and she is stealing these famous gifts to give them to herself.

Famous ACME detective Lee Jordon comes to town. But there's something...off about him.

As it turns out, Lee Jordan works for Carmen, and is attempting ""the biggest heist ever"".

Carmen's thefts all seem to follow a Wizard of Oz theme. While chasing after Carmen, Zack and Ivy discover that Carmen was an orphan. They trail her to the Golden Gate Girls' School which is about to be torn down. The detectives recover all the stolen objects except for the orphanage. Zack and Ivy see this theft as being almost justified though because it was about to be torn down and was the only home Carmen ever knew.

Somehow, the world's largest diamond, the Star of Africa, was stolen. The police are baffled and it's up to Zack and Ivy to figure this mystery out. They soon discover that one of Carmen's henchmen tried to double-cross her and keep the diamond for himself. With a little trickery of their own, the detectives recover the diamond.

When Carmen is tricked at a heist in China, she decides to get even with a Halloween surprise. She decides to set up a haunted house with items she's recently stolen. Zack is a bit frightened by all the spooky stuff in the house, and has to convince himself it's all fake.