When an undead movie star asks you for a small favour, you know you're gonna be in deep trouble.

Seeing ghosts is just something I've learnt to live with. They're everywhere I go, especially since I chose to study history at the Sorbonne, one of the oldest universities in the world. While on a class trip to the Pantheon, where France's great men—and women!—reside, I get introduced to the fabulous Josephine Baker! One of her war medals has gone missing, and she wants me to find its whereabouts.
Who could say no to a flapper girl turned movie star turned war hero? Little do I know agreeing to do so will send me on a wild-goose chase across the country with a ghostly pet cheetah, hidden walkways, and a murder attempt.