Danton Cord is one of the most popular boys in MacGuffin Elementary. His friend, Iris Able, is a loner whom people think is weird. Because she doesn’t talk to anybody, the kids in school have given her the nickname “Private Iris”. However, Iris is also the smartest and most observant person in town. When the money of a class’ cashbox is stolen, Danton sees this as a chance to make people see how special Iris really is. If he can convince her to solve the crime and get the class its money back, maybe he can get Iris to be a bit more popular. But will Iris be willing to help out people she doesn’t like?

Glowing slime. Floating objects. Mysterious messages appearing on walls. Could all these strange happenings really be because of a ghost? Some of kids believe so and are willing to pay any price to get rid of the unwanted spook. But Danton thinks this is all some big hoax to trick the kids out of their money. Once again, he has to get Iris to help him prove that there’s no such thing as ghosts. Will they succeed, or will they find out it’s not a good idea to go up against an angry spirit?

Iris' sister, Amber, is missing! A ransom note has been left at the Ables' home, demanding the mysterious flash drive that Iris discovered at Swifty Corp. in exchange for Amber's safe return. With less than 24 hours, it's up to Iris and Danton to rescue Amber and figure out who is behind her kidnapping. Will they find Amber before Iris' dad is forced to return the flash drive? And what is the connection between Amber's abduction and all the mysterious symbols Iris has been finding all over town... and in her own secret headquarters?

A series of thefts and acts of arson have been happening to various stores around MacGuffin. They all appear to be the work of the famous thief, Eidolon. The secretive sleuth Private Iris and her friend Danton Cord decide to stop Eidolon before he destroys another establishment in town. But why has the mysterious burglar suddenly gone from simply stealing things to burning down stores? It’s up to Iris and Danton to find the answer.