The demon princess Emilia invites Mary and her friends to the island kingdom of Relirex for a much-needed summer vacation! However, on the way, their ship runs into some trouble with pirates...ghostly ones, at that! Once they finish braving the troubled waters and reach their destination, Relirex turns out to be a beautiful island getaway. However, it's not all rest and relaxation: the port town's mayor, Dabzal, has political aspirations that may have more to do with the invincible little lady and her friends than they anticipated... On top of that, Mary has caught the attention of a talking leopard—yet, according to everyone she asks, anyone who hears leopards talk is either delusional or a powerful holy woman!

How will Mary and her friends react to Dabzal's movements? And can she convince them that she's not a walking saint, she's just really good with cats? Find out in this first installment of Mary's adventures in the demon kingdom!